Foxee Cart not working with Multi Site Manager...

I have also posted this thread on the Foxee forum, but I thought I would give it a shot here to see if I had any luck.

I have installed the Foxee files and everything works fine while I am on my “defual_site” CP. But if I select either of the other 2 sites, after trying to click on the Foxee module I get white screen.

Any ideas?

[Mod Edit: Moved to the Modules forum]