Make sure, in the CR2, that the hip is welded to the correct body parts. If the groups in your "dress" object consist of hip, lthigh, and rthigh, make sure the hip is welded to the lthigh and rthigh instead of lbuttock and rbuttock.

The weld statements are located almost at the bottom of the CR2. Just do a search in a text editor for weld and you should find them.