My USB will not connect to the internet?

I have a Linsys Wireless USB thing that connect to the wireless internet at my house. I have had it for a while now and the past few weeks it has been acting up. My wireless has a pcode. And its been taking it a while to connect. I restarted my computer yesterday because it froze. When I tried connecting to the internet it would keep failing. It hasnt been connecting since. The main wireless is working in the house just fine and I have tried restarting my computer and the USB. HELP please! ASAP