Hasta La Motion!

Hello all,
I’m new here.
I’ve been having a problem with pftrack and boujou, was hoping somoene might be able to help.

I’ve tracked and solved a shot in boujou and pftrack and the results are similar. Objects i know to be in the foreground come out in the background in the 3d view and vise versa.
the camera move seems to be correct. The focal length is set at a fixed 40mm. (the shot is underwater so hard to determine, but it was expected to be about 40) the camera is a free move but is very slight and almost like a nodal pan.

is there any way to invert the solve in either boujou or pftrack?

All help is much appreciated.
Cheers

Dom.