09-21-2013 02:03 PM
Welcome to BlackBerry Support Forums
Go through this Knowledge Base article and try those steps to recover your device :
KB10144 : How to force the detection of the BlackBerry smartphone using Application Loader
Please note this method will delete all user data from that device, if you have a previous backup or using BlackBerry Protect then you can restore it from there.
Additional Information :
KB12077 : "JVM error 545" appears on the BlackBerry smartphone