I am away from the shop but I think the feed back is telling you the card is not present.

I am sure you have, but double check the hardware.
Are you using a socket for the SD card or some other way. I was using a two row header at first myself and had the problem of getting a good connection at times. Make sur you have the pins aliased correctly, another mistake I have made.

Do you have a schematic or a good picture of the hardware?