will the generator start normally otherwise?
if so, when the AGS tries to start the generator, try pushing your AUX button on your dash at the same time(if you have one)... this ties the chassis(vehicle) batteries and the coach(house) batteries together for greater starting power.
otherwise, it sounds like there is no fuel getting to the generator( a plugged or clogged fuel filter, etc), or the spark plugs are not getting any 'spark'(electricity)...
'14 Palazzo 33.3 bunkhouse 34' diesel
KingTailgater2 Dish HD, 100w/5a SOLAR, BlueOx
110,000+mi since '14 - US, Alaska, Canada (also, '14 Gulfstream Amerilite and '07 ForestRiver Rockwood) : )b