I found following info from BB forum. I hope this info is helpful for you. You can reload your BlackBerry Device Software yourself if you have access to a computer and an internet connection. This article provides the steps to back up your data and reload your BlackBerry Device Software using the BlackBerry Desktop Software. Once the software reload has finished and you've verified that the error message is no longer there, you can restore your backup file by following the steps in this article.

Thank's vipal i will get back 2u ones i have it done

Vipul u ar d man(y)thank it is now working but I 4got 2 backup my data:( nd now dey ar all gone, how ever I will down loud them back:). Think ones again.