Precision 690 dual processors after mobo replaced

I just replaced the motherboard, power supply, and front assembly panel on advice of tech support on my Precision 690 .  Now I am getting this error "Alert! CPU installed in incorrect socket. Strike the F1 key to continue, F2 to run setup utility."

In the BIOS I only see 1 CPu and this machine there are two.  I ran the Dell diag utility once and then saw the two proceesors but then it Blue Screened a couple times.  And then now in the BIOS I still only see the one.  I have triple checked that they are seated correctly.

Any and all help would be appreciated. 

:emotion-15: