I have the weirdest issue with this because it is so random. Often when I try to connect to the MW3 server I get the "Unable to Connect" error. Montog suggested restarting my Steam or my computer. That has worked on occasion. What is baffeling me the most is that I have no problem getting on other servers. Only the =FF= server does this to me. It doesn't matter how many people are on, if I try this server first (which I do if even 1 person is on it), if I attempt the restarts or even restart my WIFI. It can take me a 1/2 hour to get on or I can get on first try. It is extremely maddening!