@Nearly-Right
If your Mediator has DMA jumpers (not sure if they all do), make sure they're set properly for PCMCIA card use (check the documentation).
After that, I'd start by removing CardPatch and CardReset from your startup. Insert the card after startup and verify it's there using CardInfo from the cnet.device distribution. (It's a general purpose utility and not tied to cnet.device.) If it's there, start your stack. If everything still works, fiddle with CardPatch and CardReset. Speaking of, don't you only need one or the other? I don't recall.
Trev