imessage verification

Dear forum,

I recently updated to OSX 10.8.2 and I want to link iMessage with my iPhone number but I can't. I add as an email my phone number with country prefix plus + sign but I do not receive any sms or code verification. I read that this process shall be done automatically but this is not my case. So, how can I add phone number to OSX 10.8.2 iMessage? Am I doing something wrong?

Thanks for your time.