Cornish, I think it is time to look at talking to the cam manufacturer or failing that, have a look at the websites of major card manufacturers like Lexar and SanDisk. They may have a FAQ, or even a contact. All of these cards use licensed technology and are very similar to each other.
Another thought is to follow the link
and post a message. The PhotoGeeks here make me look like an Amoeba by comparison.
http://forums.dpreview.com/forums/forum.asp?forum=1023
Conan