04-15-2009 11:22 PM
You will need to use the Desktop Manager software.
Go to Backup/Restore -> Advanced.
Select SMS Messages
Click the Clear button.
This will delete all your SMS messages but this is the only way to get rid of the messages.
The reason: The database on the Handheld is corrupted and when the software tries to delete the entries the database index doesnt show / access them.