diff --git a/dagflow/dagflow.py b/dagflow/dagflow.py
index 3bf8d89..479bc34 100644
--- a/dagflow/dagflow.py
+++ b/dagflow/dagflow.py
@@ -11,6 +11,8 @@ Features:
 - RBAC-based task assignment
 - Query APIs for UI
 """
+from appPublic.log import debug
+from sqlor.dbpools import get_sor_context
 
 # ---------------------------------------------------------------------
 # Table definitions
@@ -104,15 +106,20 @@ class FlowEngine:
 	def __init__(self):
 		self.aio = []
 
-	async def bgtask(self, app):
+	async def bgtask(self):
 		env = ServerEnv()
 		self.aio = []
-		async with (env, 'workflow') as sor:
-			self.aio = await sor.R('flow_instance', {'status': 'running'})
+		cnt = 0
 		while True:
+			async with (env, 'workflow') as sor:
+				self.aio = await sor.R('flow_instance', {'status': 'running'})
+			if cnt >= 60:
+				debug(f'{self.aio=}')
+				cnt = 0
 			for r in self.aio:
 				self.step(r.org_id, r.id)
-			await asyncio.sleep(0.5)
+			await asyncio.sleep(2)
+			cnt += 1
 
 	async def create_definition(self, org_id, name, version, dsl_text):
 		env = ServerEnv()
@@ -129,7 +136,7 @@ class FlowEngine:
 
 	async def create_instance(self, org_id, flow_def_id, ctx=None):
 		env = ServerEnv()
-		async with (env, 'workflow') as sor:
+		async with get_sor_context(env, 'dagflow') as sor:
 			iid = env.uuid()
 			await sor.C('flow_instance', {
 				'id': iid,
@@ -147,7 +154,7 @@ class FlowEngine:
 
 	async def step(self, org_id, instance_id):
 		env = ServerEnv()
-		async with get_sor_context(env, 'workflow') as sor:
+		async with get_sor_context(env, 'dagflow') as sor:
 			insts = await sor.R('flow_instance', {
 				'id': instance_id,
 				'org_id': org_id