Acer Aspire laptop WiFi problem

I am having the problem with Acer Aspire laptop when I connect to Wireless internet, and after 15 minutes it disconnects. I installed XP on my Acer Aspire laptop. Can't find a solution.

Can some one help me ?

Thanks

I think there will be WiFi signal problem. If signal is low then then there are chance of disconnect.

Yes i am facing this problem in low signal area. when i receive good signal that time didn't face any problem. that means there is no problem in my laptop.

Thanks