ok, so none of that worked. I did a quick track in mocha, which didn't work too well before but with a lot of manual adjustments, it placed it in there nicely and now moves with the "track". I think it had to do with actually having corner pins which uses the entire comp versus masking the solid and the mask traveling around the comp. That was my earlier guess.
So, I guess the bottom line though is you can't really apply to a masked area of a solid when the mask is floating around.
Eric