I wonder who installed your XP. Most forget drivers for motherboard and much anything else and land where you are.
I have windows 98 on my computer now with verizon dsl and dont have any internet connection problems. But when i installed windows xp, i cannot connect to internet. I've searched until my head hurt with no progress. Techs from verizon tell me it's an os problem. I tried making a new connection through a wam miniport and i get "error 678 no connection". I've even reset the TCP/IP stack. It didn't work either. Then i set the media type values to 10 mps half duplex. Nothing seems to work.