jide , dont post your problems on someone alse topic.Its not polite and a bit of a di(k move.Second , if u`re banned, reinstalling the client will not help you.So make your own topic to QQ....

notodin Screenshots, please.
Gamefolder, the error

Please provide screenshots of where you installed the dlc to

Make sure you enter your username, email will not work. Also ensure you are typing your username is the proper case. Usernames are CASE SENSITIVE.

Because the ping in-game takes the time it takes for your packets to be handled into account. The ping on the server list does not. This delay is around 20ms, depending on how fast the server is

Essaie de faire un thread en anglais déjà, et donne plus de détails...

ive already been there several times forwarded the same port multiple times still nothing just infinite connecting

You have the location in the launcher wrong redirect it to where you have your mw3 downloaded

Happening to me as well. It wont even apply the changes when I restart.

This means your game files are corrupt / incomplete. Please verify your game files on steam.

Yes you can, you'll need to create a new steam library (possible in steam settings) for that drive if you don't already have one. Then when starting the download it will ask you which library to want to download the dedi server to.