COD Modern Warfare - No server found

Issue

I have a legal copy of COD 4 installed and wanted to try some multi-player games. I've only been able to connect to a server once and played for a couple of seconds, before being disconnected.
I don't understand, I have a Steam account, punkbuster is installed ...etc

Solution

It should be note that most of the games protected by Punkbuster are not compatible with software like Daemon Tool, Alcohol 120...etc

• Punkbuster consider that if your PC uses this kind of software , then there's a possibility that you're using a cracked version of the game.
• Disable all your virtual drives during gameplay.