Randomly losing connection. Help!

[Calibretto]

This just started happening recently and it's doing it frequently. Every 15 to 20 minutes usually. I lose connection but it still says in the system tray that I'm connected. I get disconnected from XFire and can't surf the internet. My mom doesn't have any problems with her connection. She's connected directly to the router and modem. I'm connected wirelessly. My router is a D-Link DI-624. I have a D-Link GWL-G120 Wireless adapter. Any help would be appreciated.

 

[ptthesoundguy]

It may be your wireless card. It may have a strong enough connection to still be connected but not stong enough to get "internet." That's what happens to my moms computer. Hehe thats why I make her go wireless and i'm connected directly to the router