Need a little help with logging in.

I finally am able to enter my email and password to log into the game, but when i do it comes up to a downloading patch screen. quits and then says, "Patch Required. Press the restart button below to exit World of Warcraft and download the patch" what patch do i need? I thought I had all of them. It says version 3.3.5. ANyone have any ideas?

you have to log-in by using warmane account name, not email address.

Be sure your client is still 3.3.5 otherwsie you need to download it again