um i dont think you searched well enough because this has been talked about MANY times before in fact i had this problem and fixed it and i believe their is actually a guide written on it. In fact i had a Sprint Diamond i got hacked working on the Verizon network and ive had teh same problem for awhile, ive posted and fixed it myself. Its been talked about more then once. If a 2 second search doesnt bring it up try again.
http://forum.ppcgeeks.com/showthread.php?t=33351
http://forum.ppcgeeks.com/showthread.php?t=31249
http://forum.ppcgeeks.com/showthread.php?t=33980