Other users posts published under admin FB name

Hi,

How to set up the plugin to autopost to a Facebook Group Page NOT under the website’s admin name?

As an admin I had to authorise my FB account in the settings pane, and now posts published by other users appear on the Group Page as if I posted them. This is wrong.
Am I missing something?

Thanks. Otherwise great plugin.

http://ww.wp.xz.cn/extend/plugins/social-networks-auto-poster-facebook-twitter-g/