Hi,
I also have a simular problem, apart from only way to get internet to work is to use a proxy server.
ive tried refreshing the connection useing the windows xp feature which brings up an error
i also tried useing the ipconfig /renew fuction which dosnt work for me either, ive also tried reinstalling drivers, unplugging modem and leaving it for a while all with no luck, modem i use is the terayon tj210 and i'm on 1.5mb package and live in Nottingham area. if any one can help me i would be so greatful
ty.