Dude, same happened to me haha.
It sucks :(
Im lvl 8 warrior and i tried logging in today and it wont let me.
Guess luck wasnt on our side...
But there has to be a logical answer to it :P.

Maybe they noticed how many people were on the island killing prince slime in the event and realised that there were a lot more people then were in CB so they fixed it.

Yeah it kinda sucks...now I gotta wait for open beta which is still at least a month away :(

same thing happened to me