Yes, if you read my post, you would see that I stated the script will generate an error if you are using list controllers.
To remedy this you'll have to modify the script to match your controller setup. Something along the lines of:
For j in 1 to selection.count do -- (this cycles through all selected objects, and adjusts their look-at axis)
selection[j].rotation.controller.controller.target_axis = 0 --(this is the value to change the axis. 0=x, 1=y, and 2=z)
The part in bold is most important. That is the position of your look at constraint in your rotation list controller. So if it's the 1st controller in the list, use "", if it's the 2nd, use "", etc.