Can't play CF

I am having trouble connecting to servers or games. I will either get into a server and into a game and then get a "Failed to connect to server" message after being forced from game, or I will click on a server and wait 5-10 seconds before being told that I am unable to connect to a server and being forced to exit the game. Help please?
-I've re-downloaded and turned off firewall/anti-virus
-Have tried other online games and they work