There are a couple of compatibility issues with these cameras and memory cards.
Basically, you need to have 5v flash (all the current stuff is 3.3v) and it needs to have an obscure 'hi-speed' pin asserted or it won't work.
The ironic part is that all the newer flash memory is much faster than the old stuff, yet doesn't have that magic 'hi-speed' pin asserted, which is why you can't get a CF card in a PCMCIA adapter to work.
All I've ever found to work are the old 5v ATA 'Hi-Speed' (marked as such) PCMCIA cards. Fortunately, they are still found on eBay.