If you are using FDS boards, have you used IITcreator for the switch and led assignments?
I have very recently moved from a well known A320 software suite to Jeehell which required a complete reassignment exercise including using IITcreator.
Initially I had a problem as Gen1 and Gen2 would not come on line although all the start-up procedure was correct.
To cut a long story short, I found that the problem was my IDG switches and how they were assigned (up/down/toggle) in IITcreator. The physical attributes of the switches were different to all my other switches. What was happening, because of the way the switch was configured, the IDGs must have been disconnecting straight after powering up the aircraft.
Initially I thought it was a software problem but dismissed that as the start sequence was fine if I used the graphical software without starting my hardware boards.
I'm finding that any errors in your hardware setup will cause problems since the software's logic is excellent! :-)
The IITcreator has a couple of bugs in it e.g. the IDS 2 and 3 Allign leds are the wrong way round...
Regards,
Darren Sugden