Pftrack 2011 and softimage

Hi,

I take a short, track it, solve it, orient the scene, then export it.
I import into Softimage, load the same tracked movie clip as a rotoscope but the ground plan never matches.
I have the correct camera selected.
The test object in the pftrack scene all looks fine and no jiggling, so looks like a good tracked shot.


Is this something to do with image ratio or scale or something no being set correctly in softimage?
Any ideas?




Thanks


G