It sounds rather like the adapter, or stack of adapters you're using (there's soooo many possible combinations for solid state late model iPods) is faulty, or perhaps it or the card itself are improperly seated.
There's always the acid test of:
"Does it work in the OF?"
For Windows hosts {re-}install iTunes if you haven't already and then connect the device USB and force the device into DFU mode, iTunes should offer to restore the "damaged" (iTunes essentially thinks the device is inoperable under emCORE because the installation wipes out the original firmware completely) iPod. If it does not offer to do so, but the device is detected, check for a firmware update and hold the Shift key, and it will prompt you to supply a path for an .ipsw (iPod firmware) file. You can retrieve a copy of the original firmware for the device from
this location.
For *nix based hosts, you can follow a procedure outlined in the Freemyipod Wiki to
restore an iPod Classic without iTunes.
The latter seems somewhat intimidating, but if you managed to install emCORE in the first place you should be more than capable. Have some small comfort in the fact that from a software point of view these devices are essentially indestructible. An end user needs to be deliberately trying, and trying quite hard I might add, to even get to a state where it is only mildly annoying to recover from at best.
[Saint]