I'm not getting Facebook Notifications on my iPhone 4s?

[doodahwotsit]

I got a new iPhone 4s earlier today, set it all up and everything was working fine. I installed Facebook and was receiving notifications through. Then all of a sudden i stopped receiving them. I've deleted and re-installed the app, forced close down on the app and restarted my phone. After i did this i reopened the app and i started to get the notifications through again but this time i had no sound with it. Then i updated everything to iOS6 and i am still getting the notifications through but only some, not all and there is still no notification sound!

Does anyone know how to fix this? It is so frustrating!

Also, i'm not sure if it is possible but is there a way to change the notification sound (once its working) to a different sound than everything else? I can't find a setting in the Sounds menu to do this.

Thanks!

[Pink Panther]

settings>notifications>facebook toggle sounds to on.