I had the same problem earlier ! I clicked on my user name and there was an option of "personal messenger" which I clicked on and it worked after that ! Good luck in case it was a coincidence !
It starts on Wednesday 3rd September at 6.30pm as a wedding is using the hall this week !It's £40 for the 10 week block I think but check out Zumba Shetland on facebook or phone Mandy on 07863554904 , I go on Tuesday to Sound Hall and really enjoy it !