I had this problem for a long time,I was wonding if it can be fixed.When I select ROB with no hacks over him he freezes when on stage but everthing works fine but him.
Perhaps there's something in your codeset that's causing an error. Regular Rob should have no issues. He's not even a part of the common pacs in regards to fitmotionect, so check your codes.
use this
http://www.mediafire.com/download/8vj8809jx1nc8po/BeyondYous+Riivolution.rar (http://www.mediafire.com/download/8vj8809jx1nc8po/BeyondYous+Riivolution.rar)
, dont use FPC 3.5.1 while using riivolution