First, pull the battery and allow for a reboot. If that does not get it working, you may need to resend your service books. To resend your service books, follow the instructions at http://blackberryfaq.com/index.php/How_do_I_resend_my_service_books%3F
Hope this helps,
I know the old saying, "a picture is worth a thousand words" is true, so I prepared a little "how-to" send your service books in a PDF file attached to this post. I hope it helps.