[Plugin: Social] Blank screen

I’m using wordpress 3.4.1 with social 2.5 (own installation).

Today I tried to broadcast an article published last week, but I get a blank screen.

I go to an article, then click on “Edit”, then I click on “Broadcast” (I have configures facebook and twitter).

I also saw an error at apache log, but I can’t understand it:
[Mon Aug 27 13:27:03 2012] [error] [client ....] PHP Fatal error: Call to a member function get() on a non-object in .../wordpress/wp-content/themes/eclipse/functions.php on line 177, referer: https://lupa.homelinux.com/wp-admin/post.php

This is the url that appears with the blank screen: https://lupa.homelinux.com/wp-admin/post.php?social_controller=broadcast&social_action=options

any idea?
thanks in advance

https://www.ads-software.com/extend/plugins/social/