Thanks for your prompt answer Derek.
Yes I did copy the complete file (several times out of frustration). I have been transferring files for many years, but this is my first experiment with the cropped640 image out of the camera. I just can't work out why it wont show. In fact there is other footage on the same reel that was shot in 1080 and those show in the transfer browser, but the cropped clips have not been dropped in. However theses clips are in the reels when I look at the footage straight off the file, without FCP.
So is it known that the canon plug-in cannot handle the cropped images? That's annoying. I don't have streamclip, but using compressor, I've never had to do it that way before... another new learning curve!