How to restore activity to active

Hi My Workflow Map  =>    Start-->A-->B-->End In A ACTIVITY  I add Server Events 【on Activate】, when method error I want A ACTIVITY  state is Active and I can resend. Actually A ACTIVITY  state is closed, so this workflow ACTIVITY  no one state is active. I try update some data when resend show error  Exception of type 'Aras.Server.Core.InnovatorServerException' was thrown Have anything else I need update or do something?   Update data： --ACTIVITY update innovator.ACTIVITY set [STATE]='Active',ACTIVE_DATE=null,CLOSED_DATE=null,CAN_DELEGATE='0',CAN_REFUSE='0' where ID='9D1BCFD366564AC68C4E7F69F5B42F73' --ACTIVITY_ASSIGNMENT update innovator.ACTIVITY_ASSIGNMENT set CLOSED_BY=null,CLOSED_ON=null,COMMENTS=null,[PATH]=null where SOURCE_ID='9D1BCFD366564AC68C4E7F69F5B42F73' --WORKFLOW_PROCESS_PATH update innovator.WORKFLOW_PROCESS_PATH set IS_COMPLETE='0',IS_CURRENT='0' where SOURCE_ID='9D1BCFD366564AC68C4E7F69F5B42F73'