Whenever i join i a PUG and ready up it puts me on a team and has a link saying join E.G Attack Teamspeak i click it and it says Page cannot be displayed. Im kinda new to this so could anyone help me? Thanks.

download Teamspeak 3 here: http://www.teamspeak.com/?page=teamspeak3

Its a Voice-program, you can talk to other people there, I'd suggest to get a microphone too and get away from boxes if you use them.

also since a few weeks there is the "Join over Xfire" button which will redirect you to the server if you are running Xfire, a voice/chatprogram designed for gamers (if its able to track Cod4.)
http://de.xfire.com/download/now/ (the link could be in german, but dont worry theres an english version of it too )

i hope i could help you.

Thanks man it worked much appreiciated