Geometry,
Cloth room settings,
Certainly NO groups, the whole thing has to be one single group.
Parenting?
We need lots more information to help you.

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"!