It appears you were banned by Architect on December 26th for inappropriate language. That's assuming this is you: http://steamcommunity.com/id/Yourbuddy69/
This is also your third ban, the first being rushing, and the second being "Attitude, undermining admin, rushing, kicked and warned. Generally rude to others."
I'm gonna leave this up to the L4D2 folks that will remember you, but given what I see so far with your bans, your forum name, and the only other thread you've posted being this: http://gamrs.co/forums/index.php?/topic/45132-admin-abusive-for-a-tiny-joke/ I don't feel inclined to unban you on my own.