I need some help please...

I have some dynamic kneelength pants (a hakama from Yangya, I think from poserclub.jp) for M4 that I just can't get to fit to him. The stay nicely on his hips, but the legs stand out to left and right, unmoving.

 

I removed the constrained parts on the pant legs, tried to rotate the pant until the sit right and create a constrained group then, so that it sticks to the right part of the leg, turned IK on M4 on and off, exported the pants as obj... nothing works.

 

Does anyone have a tip or a tutorial?

 

I also tried with choreographed groups on the pant leg, but Poser just doesn't work with me...