Hello everyone

I'm new in this forum but I decided to register and post my problem as I haven't found a solution for it anywhere else, although some other people have also complained about it.
First of all, I would like to point out that I'm kind of a newbie when it comes to Macs.
Anyway, here is the thing: I have a macbook pro with mac os x and I have decided to install windows XP in it using bootcamp. I have installed the drivers and everything seems to be running perfectly, but when I try to access the internet using a wireless connection (on windows), it connects but isn't able to get an IP address. That is, I get stuck in the "acquiring network address" message, and after a while it just says it is unable to connect. When I change it back to mac os x though, I can access the internet, as if there was no problem at all.
I would appreciate if anyone could help me with this