diff --git a/control/register.go b/control/register.go
index 8228a6bc..4656eb60 100644
--- a/control/register.go
+++ b/control/register.go
@@ -4,11 +4,9 @@ import (
 	zero "github.com/wdvxdr1123/ZeroBot"
 )
 
-var m Control
-
 func Register(service string, o *Options) *zero.Engine {
 	engine := zero.New()
-	m = *New(service, o)
+	m := *New(service, o)
 	engine.UsePreHandler(m.Handler())
 	return engine
 }
diff --git a/control/rule.go b/control/rule.go
index 1a114167..a6dd0a37 100644
--- a/control/rule.go
+++ b/control/rule.go
@@ -76,6 +76,7 @@ func (m *Control) Handler() zero.Rule {
 		err := db.Find(m.service, &c, "WHERE gid = "+strconv.FormatInt(ctx.Event.GroupID, 10))
 		if err == nil {
 			m.RUnlock()
+			logrus.Debugf("[control] plugin %s of grp %d : %d", m.service, c.GroupID, c.Disable)
 			return c.Disable == 0
 		} else {
 			logrus.Errorf("[control] %v", err)