Need some more information to help you out a bit more
is your internet working at all, and if so is it running at a lower speed than it should be, or is it off all together?
sometimes your phone line can have a fault and you need to report it to the company than runs the phone line thingo in your area. having a phone line fault doesn't mean your phone and net won't work, you might hear a fuzzy sound through the phone and internet can be at a lower speed than usual.
if that's not the problem ring your ISP and get them to help you enter settings for your router .. if you have one, by accessing the default gateway address and doing what they say, they should help you through that
other than that, if you've had bad weather in your area lately your line could have been messed up or router could've misfunctioned. sometimes your isp will provide you with a new one at no cost.
sorry if this is no help at all mate.. i could have possibly just wasted a lot of time, but i hope it does help in the slightest
03/05/2008
Pro Evolution Soccer 2008
Central Coast, NSW