using woothemes, FB comments and FB send not working - newbie at this

Hi

I've installed the Ultimate FB plugin - so far I can like and comment on a liked post. But I can't seem to get FB comments to come up under my comments section of each post and when I click on the FB "send" option (an AWESOME option by the way - because I can send it to specific groups or people, which I really like) I get this message:

We encountered the following error when sending your message: Argument 1 passed to ExternalNodeFetcher:: needsUpdate () must be an instance of entopengraphobject, null given

I am using woothemes Canvas 1.0.3 with WP 3.1.4 - http://www.hayesfamily.co.za

Any answers? I need loads of hand holding in this.

Thanks!