Blackberry help please regarding facebook?

I bought a blackberry curve 9300 today, and so I set all my wi-fi connection up to my router, but when I clicked on facebook, it sais 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 update your service plan. What does this mean, and how do I register with facebook on my blackberry, thanks in advance.