Hello. My name is***** can help you with your question.
This is fairly common with Facebook on the BlackBerry. Particularly when you remove the app and reinstall it, for some reason it can take as long as 24 hours before it starts working properly. It doesn't seem to be related to restarting or resetting anything, you normally just have to wait it out. I would just make sure that your account is working properly from your computer, and if it is, give the BlackBerry app a little time and it should start working. If it doesn't, let me know and I'll continue helping.