I seem to recall that very new users wouldn't be allowed to do things like set signatures until after an amount of forum activity to confirm them as not being bots. So you might have to wait until then.
oh thanks :DCorrect. To prevent bot registration SPAM users require a minimum of 1 post to setup their signature.
It says a minimum, so you may need more.I posted 1 time and i can't set it!
I posted 1 time and i can't set it!
It says a minimum, so you may need more.