Hi,
i have managed to sort the problem out.
usually i just connect the sxs card or harddrive to my pc and open the folder to view the files. i usually preview them in vlc media player before dragging them individually to my timeline.
but i couldn’t see the actual files for the last few clips that i shot because they must have been partially corrupted (maybe due to a bad cluster in my sxs card when recording).
i think the reason i couldn’t see them in my pc is because it reads the files differently to how the camera or the harddrive reads files and the slightest problem with a file makes it incapable of being read by the computer.
my friend took a look at it and dragged the whole bpav folder into his final cut pro timeline. you could then view the files because the editing software reads the files in a similar way to the camera.
thanks for the help anyway : )