02-05-2013 02:30 AM
Welcome to BlackBerry Support Forums
If you are having problem with BBM7 , then try those steps :
First On your Homescreen go to Options > Device > Application Management > Delete BlackBerry Messenger from the list , then perform a Battery pull restart by removing the Battery while your device is Powered On .
Then Reset your BlackBerry ID password , For help refer to this Knowledge Base :
KB26361 :How to change or reset a BlackBerry ID password.
Once you have reset your BBID password login with your new BlackBerry ID password on your device.Finally from your device Browse to www.blackberry.com/bbm to download the recent version of BBM available for your device. After installing your device may reboot and associate with your BlackBerry ID.
Or if you want to downgrade it to BBM6.2 again Uninstall BlackBerry Messegner from Options > Device > Application Management > Delte BBM , then perform a Battery pull restart , finally from your BlackBerry browser browse or click here http://mobileapps.blackberry.com/devicesoftware/en
Please try it and let us know of your progress.