How can I get rid of a stuck facebook notification on a blackberry Curve 8250?

[Cailan]

I have recently got a Blackberry Curve 8250 for Xmas and am up and running with the 'Blackberry Service Bundle' however earlier in the week I got a facebook notification from one of my friends commenting on a status, and now it won't go away, even if repeatedly check it in the notifications tab at the top right of the BB facebook app.

How do you get rid of this as it wont go away and by the looks of it, it's preventing me from receiving any other notifications to my phone and stops me being able to upload photos successfully however on a computer it works fine :L

Any help would be greatly appreciated! Thanks!
UPDATE: Tried to log out and now it's just endlessly saying "Updating.. " and I am unable to do anything what so ever! -.-

[D]

Log onto the computer and check your notifications. Then log out on your phone and sign in again. This should reset it

[Sam]

Go on Facebook and click the notification then it should go away that's what I did on my. Blackberry