How do I get into my facebook app on my blackberry 8320?

[best ever]

Hi I installed the facebook app for blackberry and whenever I try to get in it when I press the facebook app it comes up with this message

"You are currently on a service plan that does not support this application. If you want to use this application, please contact your service provider to upgrade your data plan"

What does that mean? I'm on Orange network and I also use my home wifi but why does that message come when my internet is working and when I have free 100MB internet on Orange. How do i fix this?

Thank You

[Becca Morgan]

You have to have loads of data to get the facebook app to work, and it won't work off wi-fi. It wants loads of data 'cause it's always scanning for news feed and therefore uses loads up.... to be honest, I prefer the internet site on the web browser than the app anyway