my housemates and I bought a new router today. Only trouble is, my computer's taken a dislike to it and won't connect. :(

I hate wirelessness networks when they don't work. I miss DiS and msn. :(

p.s. in case you know about computers and can help me, the problem is that my computer can't acquire a network address, the router works fine with my flatmate's computers and our previous router worked fine with all our computers 'til it broke.