movieClipLoader masking problem

I have a Flash shell file that holds a menu, a sound object, some controls, and a movieClipLoader. All other content is loaded by the MCL. the mcl.onLoadInit sizes all the content (mostly jpg’s) to the right size. It works fine for most swf’s too except for my flash 360 viewer.

The 360.swf has a mask inside it but it appears that when the MCL loads it, it disregards the mask and takes the full size of the content which happens to be about 2000px wide.

Any suggestions on how I can get it to target the masked area only or just the 360’s stage sizes? Any suggestion or help is much appreciated.