Ad-hoc Disabled after a few mins.

Hi guys, I'm kinda new here. But I need some help regarding my ad hoc connection.

Whenever I create an adhoc connection or joins one, it'd automatically disable within 5mins and it will auto shut off my wireless and I have to enable back my wireless for my labtop before being able to join one. I wonder if anyone can tell me how to solve or troubleshoot this problem?

Thanks.
Sorry if my English is poor.