Vision Express 3 to edit .MOV files-no sound!

I have a OEM Suite of Nero 6 with Vision Express 3 which I have, in the past, used to create OK movies.

My new digital camera produces movies in the Quicktime 7 format which cannot be edited by Windows Movie Maker (which I have used more often) so I turned to using Vision Express 3 but when I play the movie I get no sound, just the picture. Same thing happens when I use Showtime to play the video. Is there some configuration I have overlooked in Nero that needs to be set for these .MOV files?

Any help would be much appreciated.

Barbie in Heidelberg