Pants are special.
A solution is to model some suspendors on the pants that can rest on the figures shoulders. Then make those suspenders a separate group and make them invisible.

Poser 1, 2, 3, 4, 5, 7, P8 and PPro2010, P9 and PP2012, P10 and PP2014 Game Dev
"Do not drive faster then your angel can fly"!