I have add an extra question to the registration according to the info in this thread: http://www.vbulletin.com/forum/showthread.php?t=205214

However, I dont get this to work. It is this part that does not seem to work because its possible to register without to put in the right answer:

Regular Expression: ^[mM]$

If I want the correct answer to be "A" for example, the code should be: ^[A]$, right?