I've also had problems mounting CF cards in PCMCIA adapter. I actually have one 512M card which works (can't remember its brand now, it was some "never heard" brand), but other tries have failed. Those other cards have worked fine internally on A1200 when formatted to Amiga format.
But one day I made a test and made an image of my working 512M card, and then I wrote it back to one 4GB Kingston card. To my surprise it worked that way. The 4GB card showed up as 512M, of course, but did work anyway. I still haven't made any further tests, but I think that indicates that there probably is a way to make those other cards to work, but is it a size issue or formatting issue or what?
