Facebook app on blackberry curve 9300 isnt working?

[Donald Duck]

i have downloaded the facebook app for my new blackberry curve 9300 and it doesnt seem to be working properly. Although it does notify me when people leave comments on my wall - it doesnt send me any notifications when people comment on wall posts, photos or "like" comments. It also doesnt say "via facebook for blackberry" when I post things.

Has anyone else had these problems? Know how to fix them?
Thanks
Thanks, ive downloaded it twice already and its still not working. Ive also had to return the first handset because some of the buttons were sticking. I was told I only had 7 days to return it in. Im beginning to think I should have gone for a different phone