diff --git a/dbproxy/svc/u_lottery.go b/dbproxy/svc/u_lottery.go
index 3e62a1b..baac3d0 100644
--- a/dbproxy/svc/u_lottery.go
+++ b/dbproxy/svc/u_lottery.go
@@ -16,7 +16,7 @@ var (
 )
 
 func LotteryCollection(plt string) *mongo.Collection {
-	s := mongo.MgoSessionMgrSington.GetPltMgoSession(mongo.G_P, model.LotteryDBName)
+	s := mongo.MgoSessionMgrSington.GetPltMgoSession(plt, model.LotteryDBName)
 	if s != nil {
 		c, first := s.DB().C(model.LotteryCollName)
 		if first {