dancing0ut1aw

I have an Asus EeePC and netgear wpn824v3 wireless router and every time I try to connect wirelessly to the internet it tells me i have limited to no connectivity. I can hook up directly through the modem and get connection just fine. The netgear seems to be working fine. But something is wrong. It worked perfect yesterday and now today it just won't let me connect. Windows XP Please HELP