connecting to a wirleless network on windows xp

so i got boot camp on my mac book pro, and when im usng mac os x its fine, errything works perfectly. it will log onto my wireless network with no problems. however when i switch to windows there is a constant ip adress problem and it wont let me log onto it. does anyone know how i can fix this problem? ive tried restarting my modem and router but it dosnt work, i dont know what else i can try.