Server Disconnected?

[joethecouch]

A while back I lost my CoD4 key code. I found it today under my couch coverd with dirt and dust and who knows what else. So I hop onto Cod4 and I enter the key code. Its valid, but when I go to join any server it does the regular "Awaiting connection..1 .....2 ....3 ....4 and then the syncronizing game settings or whatever then it comes to setting up game it sits for several seconds. Then it goes to my desktop for a few seconds then it goes back to the setting up game. After all that, it goes to the load screen. It takes like several seconds to load. After its finished loading it sets for about 5 seconds and the screen goes black and says server disconnected. This happens on any server I try to join. And I havent played online for a long time. I want to play on the jump servers and other servers really bad!!! PLease help me!