Only works on main blog

Hi
I have wordpress multisite 3.21 and prosites latest version installed. I have installed forums

Forums

and can only get it to work on the main site.
When i try to access the Forum link in other blogs on the network it flashes biefly

pro only.....
and then takes me to an error page wp-admin/supporter.php

This is somewhat embarrassing, isn’t it?
It seems we can’t find what you’re looking for. Perhaps searching, or one of the links below, can help

Using twenty ten theme
The forums plug in is network activated
Pro sites only enabled modules are premium themes and premium plugins and upload quota.

Please advise
Jeff