No spot instance request was generated

I want to request spot instances do lightingbuilding with swarm agent,so i configured the event plugins with spot menu,i filled in my AK\SK,select the region(cn-northwest-1),the spot fleet configurations,enabled the state and the resouce tracker.But when i submited the unreal swarm job,no spot request was generated on aws console,and the status of the job is always in queued.Anyone encountered such a problem before?