Did you upgrade the size of the memory? That is an old enough camera that I wonder if it isn't able to accept memory cards above a certain size? (We had that issue recently - hubby picked up a 2 Gig card for a digital camera he was taking on travel, but had to trade me for my 1 Gig card because his was not able to read the card. My newer camera was able to read the 2 Gig with no problems).

If that isn't the issue - then I'm sorry I don't have any good info for you. Good luck!!