Hi Doomleaf, thanks for taking the time to come and post here. Merman was the admin that banned you and I am sure he will be along shortly. Currently your ban is for a day, for rushing - so either way, you will be able to play again tomorrow.
People are pretty touchy here about rushing, because what typically happens is that the player gets killed and gives the infected team a ton of points in the process, leading to large numbers of tanks to fight and making life much more difficult for the survivors.