If you truly reset your router then you may have to reconfigure it. If your belkin router is also your dsl modem or cable modem then you will have to call your ISP provider and get your user id and password to start with.
I have a feeling this device does double as your modem since you now cannot connect. Most routers will work as a router right out of the box. However if your modem is seperate then it may expect your router to have a different subnet for its IP address then the default. Try plugging your computer directly into the modem if that is the case. If it works then just reset the routers IP address to be on the same subnet.