fix bugs
diff --git a/plstackapi/planetstack/api/roles.py b/plstackapi/planetstack/api/roles.py
index 7d2d8ce..bb964f1 100644
--- a/plstackapi/planetstack/api/roles.py
+++ b/plstackapi/planetstack/api/roles.py
@@ -14,7 +14,7 @@
 def delete_role(auth, role_id):
     driver = OpenStackDriver(client = auth_check(auth))   
     role = Role.objects.filter(role_id=role_id)
-    driver.delete_role(name) 
+    driver.delete_role({'role_id': role_id}) 
     role.delete()
     return 1