diff --git a/client/client.go b/client/client.go
index e19f6b2..0f8d00a 100644
--- a/client/client.go
+++ b/client/client.go
@@ -6,9 +6,9 @@
 package client
 
 import (
-    "bytes"
     "io"
     "net"
+    "bytes"
     "strconv"
     "bitbucket.org/mikespook/golib/autoinc"
     "bitbucket.org/mikespook/gearman-go/common"
@@ -24,8 +24,8 @@ type StatusHandler func(string, bool, bool, uint64, uint64)
 The client side api for gearman
 
 usage:
-    c := client.New("tcp4", "127.0.0.1:4730")
-    handle := c.Do("foobar", []byte("data here"), JOB_LOW | JOB_BG)
+c := client.New("tcp4", "127.0.0.1:4730")
+handle := c.Do("foobar", []byte("data here"), JOB_LOW | JOB_BG)
 
 */
 type Client struct {
@@ -43,9 +43,9 @@ type Client struct {
 // Create a new client.
 // Connect to "addr" through "network"
 // Eg.
-//      client, err := client.New("tcp4", "127.0.0.1:4730")
-func New(network, addr string) (client *Client, err error) {
-    conn, err := net.Dial(network, addr)
+//      client, err := client.New("127.0.0.1:4730")
+func New(addr string) (client *Client, err error) {
+    conn, err := net.Dial("tcp", addr)
     if err != nil {
         return
     }
@@ -56,8 +56,8 @@ func New(network, addr string) (client *Client, err error) {
         conn: conn,
         ai: autoinc.New(0, 1),
     }
-    go client.outLoop()
     go client.inLoop()
+    go client.outLoop()
     return
 }
 
@@ -66,7 +66,9 @@ func (client *Client) outLoop() {
     ok := true
     for ok {
         if job, ok := <-client.out; ok {
-            client.write(job.Encode())
+            if err := client.write(job.Encode()); err != nil {
+                client.err(err)
+            }
         }
     }
 }
@@ -88,14 +90,14 @@ func (client *Client) inLoop() {
         case common.ERROR:
             _, err := common.GetError(job.Data)
             client.err(err)
-        case common.WORK_DATA, common.WORK_WARNING, common.WORK_STATUS,
+            case common.WORK_DATA, common.WORK_WARNING, common.WORK_STATUS,
             common.WORK_COMPLETE, common.WORK_FAIL, common.WORK_EXCEPTION,
             common.ECHO_RES:
-            client.handleJob(job)
+            go client.handleJob(job)
         case common.JOB_CREATED:
             client.jobCreated <- job
         case common.STATUS_RES:
-            client.handleStatus(job)
+            go client.handleStatus(job)
         }
     }
 }
@@ -112,6 +114,10 @@ func (client *Client) read() (data []byte, err error) {
             var n int
             if n, err = client.conn.Read(buf); err != nil {
                 if err == io.EOF && n == 0 {
+                    if data == nil {
+                        err = common.ErrEmptyReading
+                        return
+                    }
                     break
                 }
                 return
@@ -123,8 +129,8 @@ func (client *Client) read() (data []byte, err error) {
         }
     }
     // split package
-    start, end := 0, 4
     tl := len(data)
+    start, end := 0, 4
     for i := 0; i < tl; i++ {
         if string(data[start:end]) == common.RES_STR {
             l := int(common.BytesToUint32([4]byte{data[start+8], data[start+9], data[start+10], data[start+11]}))
@@ -193,19 +199,19 @@ func (client *Client) handleStatus(job *Job) {
 // JOB_LOW | JOB_BG means the job is running with low level in background.
 func (client *Client) Do(funcname string, data []byte, flag byte) (handle string, err error) {
     var datatype uint32
-    if flag & common.JOB_LOW == common.JOB_LOW {
-        if flag & common.JOB_BG == common.JOB_BG {
+    if flag & JOB_LOW == JOB_LOW {
+        if flag & JOB_BG == JOB_BG {
             datatype = common.SUBMIT_JOB_LOW_BG
         } else {
             datatype = common.SUBMIT_JOB_LOW
         }
-    } else if flag & common.JOB_HIGH == common.JOB_HIGH {
-        if flag & common.JOB_BG == common.JOB_BG {
+    } else if flag & JOB_HIGH == JOB_HIGH {
+        if flag & JOB_BG == JOB_BG {
             datatype = common.SUBMIT_JOB_HIGH_BG
         } else {
             datatype = common.SUBMIT_JOB_HIGH
         }
-    } else if flag & common.JOB_BG == common.JOB_BG {
+    } else if flag & JOB_BG == JOB_BG {
         datatype = common.SUBMIT_JOB_BG
     } else {
         datatype = common.SUBMIT_JOB
@@ -213,14 +219,13 @@ func (client *Client) Do(funcname string, data []byte, flag byte) (handle string
 
     uid := strconv.Itoa(int(client.ai.Id()))
     l := len(funcname) + len(uid) + len(data) + 2
-    rel := make([]byte, l)
+    rel := make([]byte, 0, l)
     rel = append(rel, []byte(funcname)...)          // len(funcname)
     rel = append(rel, '\x00')                       // 1 Byte
     rel = append(rel, []byte(uid)...)               // len(uid)
     rel = append(rel, '\x00')                       // 1 Byte
     rel = append(rel, data...)                      // len(data)
     client.writeJob(newJob(common.REQ, datatype, rel))
-
     // Waiting for JOB_CREATED
     job := <-client.jobCreated
     return string(job.Data), nil
@@ -259,5 +264,6 @@ func (client *Client) write(buf []byte) (err error) {
 func (client *Client) Close() (err error) {
     close(client.jobCreated)
     close(client.in)
+    close(client.out)
     return client.conn.Close();
 }
diff --git a/client/client_test.go b/client/client_test.go
index a85832f..3853642 100644
--- a/client/client_test.go
+++ b/client/client_test.go
@@ -1,7 +1,6 @@
 package client
 
 import (
-    "bitbucket.org/mikespook/gearman-go/common"
     "testing"
 )
 
@@ -10,9 +9,12 @@ var client *Client
 func TestClientAddServer(t *testing.T) {
     t.Log("Add local server 127.0.0.1:4730")
     var err error
-    if client, err = New("tcp4", "127.0.0.1:4730"); err != nil {
+    if client, err = New("127.0.0.1:4730"); err != nil {
         t.Error(err)
     }
+    client.ErrHandler = func(e error) {
+        t.Error(e)
+    }
 }
 
 func TestClientEcho(t *testing.T) {
@@ -29,7 +31,7 @@ func TestClientEcho(t *testing.T) {
 }
 
 func TestClientDo(t *testing.T) {
-    if handle, err := client.Do("ToUpper", []byte("abcdef"), common.JOB_LOW|common.JOB_BG); err != nil {
+    if handle, err := client.Do("ToUpper", []byte("abcdef"), JOB_LOW|JOB_BG); err != nil {
         t.Error(err)
     } else {
         t.Log(handle)
diff --git a/client/job.go b/client/job.go
index c381464..6b7246a 100644
--- a/client/job.go
+++ b/client/job.go
@@ -9,6 +9,20 @@ import (
     "bytes"
     "bitbucket.org/mikespook/gearman-go/common"
 )
+
+const (
+    // Job type
+    // JOB_NORMAL | JOB_BG means a normal level job run in background
+    // normal level
+    JOB_NORMAL = 0
+    // background job
+    JOB_BG = 1
+    // low level
+    JOB_LOW = 2
+    // high level
+    JOB_HIGH = 4
+)
+
 // An error handler
 type ErrorHandler func(error)
 
@@ -42,13 +56,15 @@ func decodeJob(data []byte) (job *Job, err error) {
 
 // Encode a job to byte slice
 func (job *Job) Encode() (data []byte) {
-    l := len(job.Data) + 12
-    data = make([]byte, l)
+    l := len(job.Data)
+    tl := l + 12
+    data = make([]byte, tl)
 
     magiccode := common.Uint32ToBytes(job.magicCode)
     datatype := common.Uint32ToBytes(job.DataType)
     datalength := common.Uint32ToBytes(uint32(l))
-    for i := 0; i < l; i ++ {
+
+    for i := 0; i < tl; i ++ {
         switch {
             case i < 4:
                 data[i] = magiccode[i]
@@ -60,6 +76,13 @@ func (job *Job) Encode() (data []byte) {
                 data[i] = job.Data[i - 12]
         }
     }
+    // Alternative
+    /*
+    data = append(data, magiccode[:] ...)
+    data = append(data, datatype[:] ...)
+    data = append(data, datalength[:] ...)
+    data = append(data, job.Data ...)
+    */
     return
 }
 
diff --git a/common/error.go b/common/error.go
index 25ca67e..8c1e8fa 100644
--- a/common/error.go
+++ b/common/error.go
@@ -21,6 +21,7 @@ var (
     ErrOutOfCap      = errors.New("Out of the capability.")
     ErrNotConn       = errors.New("Did not connect to job server.")
     ErrFuncNotFound  = errors.New("The function was not found.")
+    ErrEmptyReading  = errors.New("Empty reading.")
 )
 
 // Extract the error message
diff --git a/common/gearman.go b/common/gearman.go
index 1bdd6f7..eebaec1 100644
--- a/common/gearman.go
+++ b/common/gearman.go
@@ -54,17 +54,6 @@ const (
     SUBMIT_JOB_HIGH_BG = 32
     SUBMIT_JOB_LOW     = 33
     SUBMIT_JOB_LOW_BG  = 34
-
-    // Job type
-    // JOB_NORMAL | JOB_BG means a normal level job run in background
-    // normal level
-    JOB_NORMAL = 0
-    // background job
-    JOB_BG = 1
-    // low level
-    JOB_LOW = 2
-    // high level
-    JOB_HIGH = 4
 )
 
 // Decode [4]byte to uint32 
diff --git a/example/client.go b/example/client.go
index d406eef..d1ad7a2 100644
--- a/example/client.go
+++ b/example/client.go
@@ -3,29 +3,32 @@ package main
 import (
     "log"
     "sync"
-    "bitbucket.org/mikespook/gearman-go"
     "bitbucket.org/mikespook/gearman-go/client"
 )
 
 func main() {
     var wg sync.WaitGroup
 
-    c, err := client.New("tcp4", "127.0.0.1:4730")
+    c, err := client.New("127.0.0.1:4730")
     if err != nil {
         log.Fatalln(err)
     }
     defer c.Close()
     echo := []byte("Hello\x00 world")
     c.JobHandler = func(job *client.Job) error {
-        log.Printf("%V", job)
+        log.Printf("%s", job.Data)
         wg.Done()
         return nil
     }
 
+    c.ErrHandler = func(e error) {
+        log.Println(e)
+        panic(e)
+    }
     wg.Add(1)
     c.Echo(echo)
-
-    handle, err := c.Do("ToUpper", echo, gearman.JOB_NORMAL)
+    wg.Add(1)
+    handle, err := c.Do("ToUpper", echo, client.JOB_NORMAL)
     if err != nil {
         log.Fatalln(err)
     } else {
@@ -38,5 +41,6 @@ func main() {
     }
     wg.Add(1)
     c.Status(handle)
+
     wg.Wait()
 }