stereo expander opening in mac as stereo widener?

Hi… anyone else have a problem of opening cubase 5 sessions from another computer, say like my pc desktop on my macbook and everything loads fine except for the stereo expander? I’ve already given reference mixes to clients and I use the expander to situate group busses in the stereo spread.

I’ve never encountered this problem but perhaps it’s a pc to mac thing??? anyone have any ideas???