I've bought new macbook 2.0ghz about 2days ago, and when I connect my wireless router with airport, internet works fine for about 30 minutes and it stops responding even thought airport says the wireless is connected. (it starts responding when I turn airport off and on again) I am pretty sure that there is no problem with my router because it works fine for other computers at my house (I'm the only mac user). Does anyone know how to solve this problem??????????