If that is a ruched bust area, I'd make the whole area constrained.  You can make all those polys (or verts) a group in a modeler, or make them a separate material zone, and the cloth room will let you add them to the constrained group by adding your poly group or material zone.

     With those folds at the start, you may need to reduce the collision depth to 0.25 or 0.125

     You might also try ticking the cloth material's normals forward box.

Poser 12, in feet.  

OSes:  Win7Prox64, Win7Ultx64

Silo Pro 2.5.6 64bit, Vue Infinite 2014.7, Genetica 4.0 Studio, UV Mapper Pro, UV Layout Pro, PhotoImpact X3, GIF Animator 5