I just got a macbook c2d, and when im at home, i can perfectly connect to my wireless router.... when im at my other home at my university, i cant connect with my linksys router.. it only works when i connect the cable from my router.. could the problem be with my router, as my friend who has a mac-mini, is having the same problem.. (my friend's mac-mini sometimes couldnt connect to the internet for a day..)