I am using a Sandisk 32MB Compact Flash card with a Sandisk Compact Flash PC Card Adapter for my H8000 and it works fine. If you can exchange the one you just bought with the Sandisk it might be worth a try. If that doesnt work it could be that your connector isnt working properly, but first it might be worth getting a compressed air spray and giving the slot on your H7600 a blast just in case it is just some dust that has got in the way. Hope that helps, Good luck
