help with softbody

[matrariel]

I'm having problems with simulation of effects with bouncy softbody. I created a cluster in the breasts of my character and softbody applied and does not work. When I increased the sampling to 80, he moved a little. The character has around 10,000 polys, she is not heavy, so where am I going wrong?
my pc :i7 2600 12 gb quadro 4000.

sorry for my poor english.

[SamHowell]

Scene scale?