Animation dependencies via variables

Hey guys,
I'm trying to bind animation of 2 objects via a variable. Can't get it to work so far.
Any ideas?
I'm trying to bind animation of 2 objects via a variable. Can't get it to work so far.

Any ideas?
http://erbsen.untergrund.net/board3/
http://erbsen.untergrund.net/board3/viewtopic.php?f=41&t=1064