publish Asynchronous Message in Application Engine

I have an Asynchronous Message and when I call PUBLISH from Record Peoplecode,it is working fine and it is showing me DONE status in
Service Operations monitor.
However,when I try to use same peoplecode in Application Engine Peoplecode,it is showing me Service Operation in NEW status.

Does anybody have any idea what changes should I do to work from Application Engine Peoplecode?

Thanks