Disconnecting with an error 90000 immediately every time I log on

Character Name : Gino Zalbino, Eitheta Lombardi
World : Excalibur, Sargantanas
ISP : Time Warner
Does it happen only on one world or character ? : No. It happens on all characters, and on every server I've tried.
When the problem started happening ? : Monday, August 26th. I had no problems playing that first Saturday.

This is getting very frustrating. Even when I log in, I can't play the game AT ALL! I've rebooted my router, my modem, called Time Warner, my internet speed is fine... but I can't play at all! Help!