happened to a friends phone before.
Try the following:
1. alt+right shift+del to restart phone (optionally, you can pull out the battery and put it back in)
if that doesnt work, then
2. delete it from the application list, then reinstall by browsing to
http://us.blackberry.com/apps-software/ ... wnload.jsp (you can just google blackberry app world and click the link instead of typing that address)
if it giving trouble to download, its tstt giving trouble, try back in a few hours.
