Ok, some basic questions so you get assistance.
1) What type of router do you have?
2) What type of laptop or wireless card are you using?
3) What operating system do you use?
4) Has it ever been working or are you just starting?
(btw, don't mind Nodsu. He just gets grumpy when people don't provide enough information and he can't help them. He's a helpful guy, but when he can't help he gets grumpy.)