Worgen Rogue - Can't switch to human form!

[FeralGreyWolf]

How can I switch back to human? Whatever I do, It keeps telling me "I can't transform".
So, I read some threads on the bugtracker... but still I can't figure out how to solve this.
Am I supposed to send a ticket? Contact a GM? Enter an arena?

[Daelena]

Write a ticket asking GMs to relearn you the spell, it works fine then.