Posting feeds in facebook, can't use the API.

I'm getting a "Call to undefined method" when I try to use feed API functions like registerBundleTemplates and feed_publishUserAction.
Google has led me to believe that I need to call a function called useBetaApiServer, but I can't find any example on how to call it with PHP.

Any help?

From stackoverflow

• Problem solved using call_method. Very useful for solving discrepancies between the libs you have and the documented libs.