Wireless Connection Problem

Ok, i just got a MacBook Pro and bought a Linksys WRTG54 router with it..... i hooked it up to my pc running win xp and created a wireless connection. It connected fine on my laptop and the internet was running real smooth, then about a day later it started going extremely slow when loading pages. It took like 30 seconds to load a page, so i reset my router and created a new connection on my pc. It reconnected with my laptop and it ran very fast again, but AGAIN about a day later (now) it's running soooo slow and will not load pages. I'm using Firefox, Mac OS, 2 gigs of ram... and i tried restarting and clearing the cache on firefox, neither of them worked.

thanks for any help you guys can give me.

By WRTG54 I assume that you mean the WRT54G
I have the same router and wireless works fine with me (well...sorta)
but the speed is fine when I am connected
how far away are you working from the router?

Good Luck