This means it does not work with your card. What happens when you remove the card, boot system and insert the card later? Could you open osso-xterm insert card, wait few seconds and run 'dmesg' command and post output here or PM it to me? I think I can't help you but I'm still interested in mmc related error messages from kernel with such card.

Perhaps I could make also kernel with MMC bus speed maximum set only to 24MHz not 48. That could help with some cards and still provide at least 2x speedup.