Since the portlet works well in a user portal (and you don't see an error) I would check permissions first, also whether you are working in a member or non-member portal and whether the specific portlet isn't set to shaded/hided (I forgot the name of the variable that does that). I cannot verify right now, but maybe 'read_private_data' permission or a specific faq_ permission is needed.

Check Technical documentation at (http://openacs.org/projects/dotlrn/dotlrn-doc/ or http://dotlrn.mit.edu/documentation/groups.html#assignandtransfe ).