Hi there, I was having problems with the Silicon Motion SD card reader that's shipped with the DM368EVM. It turns out that the pads connecting the metal casing to the pcb had broken off. Here's a photo showing where we re-soldered the pads:

After soldering the pads back down, the reader started working again. Hope this might help anyone experiencing similar issues with the SD card reader. There should be a red led active on the reader when the SD card is plugged in and working correctly.
Cheers :)
Derek