Hi,
What is you operating system?
If you work on PC (Windows), first of all, try to use the latest build of the exporters:
ftp://ftp.realviz.com/private/MM4 [...] -02_PC.zip
Extract them in the "Translators" folder of MM4 ( e.g. C:\Program Files\REALVIZ\MatchMover Pro\4.0\Translators ) and export your project...
Let me know if it solves your problem.
Regards,
Niko