Ok, I have a linksys wrt54g wireless router that worked fine all summer at my house with both my airport extreme card and my old pc's 802.11b card. Now I'm at school in an apartment and the Mac still holds the connection all the time. But my friends pc's are dropping connections every 5 minutes. At home there was only my wireless network but here there are about 5 of them. Any idea what could cause this or how to fix it?