diff --git a/stat/tunnelstatus.go b/stat/tunnelstatus.go
index 384de1b..d024017 100644
--- a/stat/tunnelstatus.go
+++ b/stat/tunnelstatus.go
@@ -8,10 +8,8 @@ import (
 	"sync"
 )
 
-var mux sync.Mutex
-
 type TunnelStatusManager struct {
-	// mux        sync.Mutex
+	mux        sync.Mutex
 	tunnelList *list.List
 	regChan    chan interface{}
 	unregChan  chan interface{}
@@ -35,74 +33,23 @@ func (this *TunnelStatusManager) GetUnregChan() chan interface{} {
 }
 
 func (this *TunnelStatusManager) register(t interface{}) {
-	// this.mux.Lock()
-	// defer this.mux.Unlock()
-	mux.Lock()
-	defer mux.Unlock()
+	this.mux.Lock()
+	defer this.mux.Unlock()
 	this.tunnelList.PushBack(t)
-
-	l := this.tunnelList
-	// c := 0
-	// for e := l.Front(); e != nil; e = e.Next() {
-	// 	c++
-	// 	if c > l.Len() {
-	// 		log.Error("out of bound of list")
-	// 	}
-	// 	if e.Value == nil {
-	// 		log.Debug("a nil len of list %d c %d", l.Len(), c)
-	// 		back := l.Back()
-	// 		if back == nil {
-	// 			log.Debug("back is nill")
-	// 		}
-	// 	}
-
-	// }
-	m := t.(*model.Tunnel)
-	log.Info("tunnel %s registerd len %d", m.GetID(), l.Len())
-
 }
 
 func (this *TunnelStatusManager) unregister(t interface{}) {
-	// this.mux.Lock()
-	// defer this.mux.Unlock()
-	mux.Lock()
-	defer mux.Unlock()
-
+	this.mux.Lock()
+	defer this.mux.Unlock()
 	l := this.tunnelList
 	log.Debug("%d tunnels before remove.", this.tunnelList.Len())
-	// n := 0
 	nl := new(list.List)
-	// tn := ""
 	for e := l.Front(); e != nil; e = e.Next() {
 		if e.Value != t {
-			// log.Debug("Found")
-			// l.Remove(e)
-			// break
-			// n++
 			nl.PushBack(e.Value)
-			// en := 0
-			// for ee := nl.Front(); ee != nil; ee = ee.Next() {
-			// 	en++
-
-			// }
-			// if en > nl.Len() {
-			// 	log.Error("en > ee")
-			// }
-
-			// v := e.Value
-			// if v == nil {
-			// 	continue
-			// }
-			// m_ := v.(*model.Tunnel)
-			// tn = tn + m_.GetID()
 		}
 
 	}
-	// log.Debug("display tunnels %s", tn)
-	// if n == this.tunnelList.Len() {
-	// 	m := t.(*model.Tunnel)
-	// 	log.Debug("check tunntel %s", m.GetID())
-	// }
 	this.tunnelList = nl
 	log.Debug("%d tunnels after remove.", this.tunnelList.Len())
 
@@ -126,9 +73,7 @@ func (this *TunnelStatusManager) chanListener() {
 }
 
 func (this *TunnelStatusManager) QueryStatString() string {
-	// this.mux.Lock()
-	// defer this.mux.Unlock()
-	mux.Lock()
-	defer mux.Unlock()
+	this.mux.Lock()
+	defer this.mux.Unlock()
 	return fmt.Sprintf("There %d tunnels running.\n", this.tunnelList.Len())
 }