Facebook poker problem

Tweet

I have emailed Zynga regarding this problem and has not received any reply. So wondering if anybody here face the same problem. I am able to join a table, sit down and use the chat window. The only problem is I cannot click the 'check', 'fold', 'raise' or 'check/fold'. I have tried using another browser, change from yahoo to google, even set up a new account but still can't click any of the button. I wonder why? and how can this be solved?