One of the main irritations with the IS BVH capture are:
that the feet never stay level with the ground when send into PP2012, I send the Tpose out with feet flat etc from PP2012.

The hands come across deformed,
The figure sinks into the ground when moving, could it because the figure does not recognize the ground, or the IK is set to a fixed parameter on the legs?

Export a bvh from your poser figure,
Then import that into ipi as a target character,
Set the bones in the list then export as a bvh and will be fine

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iPi Soft