Hi there, I need help... a little tip should do it...

I have made a dress for V4 with long wide sleeves. It works in Poser very well - but when I bend the arm of the V4 the sleeve "explodes" at the seam.
In the past I tried with the bones, I changed some polygones of the hand and forearm . But with this dress it doesn't work.  Has anybody an idea what I have to do? Is this a JCM problem like the elbows?
I have no idea after hours of testing and testing....

I put some extra bones in it - but it doesn't work really. All polygons are included - that's sure.

I made bones with a new donor in Poser.... the sleeves of the dress work now but I can see some visible "bones" back in the pose room. I can't delete them and they are visible after rendering.

The thing is:
When I have unselect the "bend" in the parameter options for the forearm, the hem of the sleeve is correct, it doesn't explode. But then poser split the groups and there is a small split between the forearms and the shoulder of the sleeve.

Can anybody help???.... this dress drives me crazy.....