mastersd, did you just try to change the email address on your account? You have done something to deactivate your account. You need to take a look at the thread at the top of this page that says "If you are not fully registered. . . " and follow the directions there.
If you have changed your email then you need to check the old email box for a confirmation email that you need.
Until then you will not be able to send PMs and can only post here on the Welcome Board. And I think you won't be able to see the Rent Trade board.