I bought CoD 4 a little less than a week ago, and whenever I search for a server, I can't find any. The entire list is blank. I hit the refresh button, and it tells me that it's refreshing about 4,300 servers, but I still see nothing. I've tried restarting my computer, making sure I have the most recent patch, making sure I have my firewall set to let it through, and re-installing the game, but nothing has worked. Has anybody had similar issues? If so, have you found any fixes?