Please expand on your problem description...exactly the steps you attempt, exactly the results of each step, and the complete and exact content of any error messages presented. From what little you provided, it's really impossible to make any kind of guess that would be useful to you.
Good luck and let us know!
Occam's Razor nearly always applies when troubleshooting technology issues!
If anyone has been helpful to you, please show your appreciation by clicking the button inside of their post. Please click here and read, along with the threads to which it links, for helpful information to guide you as you proceed. I always recommend that you treat your BlackBerry like any other computing device, including using a regular backup schedule...click here for an article with instructions.