I was just playing on it last night, now this morning I can't connect. Is something wrong with it?

You may have gained too much qi to play in those servers.

I suggest trying to connect to the next level up. Which is Intermediate IIRC.

Yeah, other rooms work, but the beginner ones don't.... I guess I've played beginner too much? I wasn't doing that well, really =/ I kinda don't want to move up yet.

You have played enough matches to gain enough Qi to upgrade your belt.
Playing in the next level servers will help you improve.