I did the same thing you did and everything worked fine. But I did notice something very odd, which is some thing that I have noticed before. When I subclassed the MKbizobj to aMKbizobj and dragged aMbizobj to a form. The icon for aMbizobj while dragging was a form icon. And it would not allow me to place it on the form... So I had to recreate the bizobj several times.. weird...

I don't know if you said if you deleted the VCX that MKbizobj belongs to. But you may want to do that and see if you can just start all over.. not sure what to tell ya.. but you may want to post this somewhere else in the UT.. I don't think it's an MM issue... well then, who knows.. :-)