Hmm. I did a bit of digging and the DH61CR can support 2nd or 3rd gen CPU. I attempted to take a look at the BIOS revisions to make sure that if it had been updated to support 3rd if that would make it not work for 2nd, but the Intel support site won't show me that info without being logged in.
Hopefully someone else will post with something helpful. Thanks for listing specs.