Wireless router problem

Hello,

I'm having problems in making a wireless internet connection, and I'm hoping someone can help me.

A while ago I bought a Buffalo Airstation router. It was working fine for a couple of months, when it seemed to stop working for no reason one day. I tried to get it fixed, but I ended up giving up and getting another router and I-O data router. But same problem.

I can connect to the internet no problems. And I could get wireless internet before, so I feel confident I have set it up right. But every time I try to use the router, it just won't connect to the internet at all - wireless or on my computer.

Any ideas?

Thanks in advance