About the only thing I can think of would be the DV file format from your camera is what is called 'Type I' and your editing software requires it to be 'Type II'.
I've used this conversion program with success, but it apears to have a 4gB file size limit, so that means it wouldn't work on DV files with more than about 15 minutes playing time.
Fav quote - "Experience is whatcha don't get 'till ya don't need it no more."
System - Athlon 1.4GHz, Win98, Hauppauge PVR250 receiver and compressor.
Software -Magix Movie Edit Pro 10, Nero 6 + NeroVision Express, Moho 4.61, PSP 8.1, Bryce, Quicktime 6.52 pro, Goldwave 5, DVD-Lab.
Cameras - Panasonic GS9, Canon ES8400V, Canon EOS D20 and Canon A70