04-05-2013 03:30 PM
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Can you try Installing BlackBerry World in a clean manner , To do that , first On your Homescreen Go to Options > Device > Application Management > Locate and delete BlackBerry World from that list.
KB10040 : How to view or remove installed application on a blackberry smartphone
Once deleted perform a battery pull restart by removing your battery while your device is Powered On , wait for atleast a min. and then re-insert it back. finally after reboot from your BlackBerry Browser browse to www.blackberry.com/appworld .
Please try it .