I had a quick google - and found this..
you may need to reset the autoplay settings on your machine. Connect the device to your computer and then right click the drive icon in My Computer -> Properties -> Autoplay. Select the content type (music, videos, images etc) and then either choose the program if you see it or put a check in the box to prompt you for a respone. Then disconnect/reconnect the drive and you should either be asked again or it will open with the desired program.
sourced from here:-
http://photography-on-the.net/forum/...d.php?t=432140
worth a try!