I'm having an annoying amount of trouble getting this to work and I'm guessing it's something very simple so I need a 2nd pair of eyes. I swear I got this to work before but I don't remember how.

I just want MGEF applied when the player sneaks and to run a script on start, here's what I got:

http://i.imgur.com/RlTDHyR.jpg

http://i.imgur.com/jkSVEJr.jpg

I can apply it via console and the script works I just can't seem to get the conditions to work.

I don't know if it means anything, but I get an error when I try to set conditions, "failed to get owner quest for unowned conditions" but not sure how to fix it.

The condition on the spell looks ok.

Did you try a clean save?

I can't see why you would get that error just by setting that particular condition, unless it somehow applies to your script, there again it could be completely unrelated.