I have a belkin wireless G router and i need to

What I would do is this, in this order.

Take your router and get access to the back of it.... press the small black (or red) button with a paperclip or the tip of a ballpoint pen... press and hold it in for about 10-15 seconds (you may see the lights go off and come back on like it is going through a power cycle).... then, while STILL HOLDING THE RESET, pull the power out, and continue to hold it down for about 10-15 seconds longer, then plug it in and let off the reset button.

Try that and see if it helps.

Depending on your model. The Belkin router I have has a small black button near the power cord. It take a paper clip to reset it.