7i92+7i77 basic comms again

Hi Guys - 7i92+7i77 combo. Sorry to have to seek help so early in my project. Im trying to take it all step by step but hit a brick wall with the comms to the 7i77. It isnt being recognised by the the 7i92. I just have the boards on the bench powered from a lab power supply at the mo. I'm just using mesaflash on 192.168.1.121 with the basic linuxcnc - no realtime yet - and flashed with 7i92+7i77X2D.bin all seems OK but when I use --sserial --verbose  or --readhmid there is no mention of the 7i77. I have the two cards directly connected with their X25Dshell's - no cable - and +12V Field.
LED's - On the 7i92 Ive got the +5V LED and variously some of the user LED's lit (these vary when I interogate the card - bit odd)  and on the 7i77 LED's - +5V,Field Voltage,CR15 Field Activity, and CR16 Field I/O fault which is Red. All these LED's permanently on. Worryingly LED 6 and 7 are not on - in the manual there are +16V and -12V monitors and should be on??
Should basic comms be working as above or should I have some ini or hal commands to get things going. 
Thanks for all your help...

Sounds like you have both 7I77 processors in setup mode
That will not work, they must be in operate mode:

W4 and W12 in left hand position

Yup..you have nailed it. Many thanks both. Operate mode it now is - crash on to the next phase!
Thanks again