i have a CD black macbook. when i first moved into this apartment, i could get a wireless signal and surf the net just fine. now it won't work at all. it connects fine and in system prefs it says that i am connected. but when i open firefox, nothing loads. for anyone wondering, yes i pay for internet (too much if you ask me), but i don't have a wireless router and sometimes it's nice to not sit at a desk. but yeah since i am getting the signal from a neighbor i can't reset the router or any of that stuff. any idea what could be causing this?