03-20-2013 02:40 PM
Welcome to BlackBerry Support Forums
Please try this Knowledge Base to recover your device from this error :
KB10144 : How to force the detection of the BlackBerry smartphone using Application Loader
I hope you have your device previous backup.
KB18751 : Error "Reload Software: 552" is displayed on the BlackBerry smartphone
03-21-2013 06:15 AM
Just follow the first Knowledge Base , and let us know if you have any problem .
03-22-2013 06:40 AM
Sorry to hear that you're still unable to recover your device, If you're running windows then download the most recent version of BlackBerry Desktop Software BlackBerry desktop software .After downloading Install it on your PC .
For you help I am copying those direction as given within the Knowledge Base , just follow it :
BlackBerry Desktop Software 6.0 to 7.0:
So try it and let us know.