fix bugs
diff --git a/xos/services/cord/models.py b/xos/services/cord/models.py
index 7cd20cb..2460ec7 100644
--- a/xos/services/cord/models.py
+++ b/xos/services/cord/models.py
@@ -8,7 +8,7 @@
from operator import itemgetter, attrgetter, methodcaller
from core.models import Tag
from core.models.service import LeastLoadedNodeScheduler
-from services.vrouter import VRouterService, VRouterTenant
+from services.vrouter.models import VRouterService, VRouterTenant
import traceback
from xos.exceptions import *
from xos.config import Config