I had a linksys router and my wired and wireless connections were fine. Then my wireless randomly started to have problems, though wired has always worked. I switched out to a new router thinking that was the problem, but the same thing keeps happining. Wired works perfectly and wirless can connect to the router but not to the internet. Could the problem be the cable modem? It's older, but if it works on wired I don't see how that can be the problem.