I just bought for my fsx accelerator the c337but without using control E, I cannot start the c337by using the start buttons for the 2 engines only the props are rotating.I used the switches in the overhead and use the throttles but no luckanyone an idea whats incomplete from my side?

Not sure what you mean by using "the switches in the overhead" as there isn't much up there. Here's a checklist for starting for you. If this doesn't work, post back, but make sure you go through every step:1. Fuel Levers - ON (green arc - good idea to cycle them off then on to be sure)2. Master Switch - ON3, Rear Engine Mixture - FULL RICH4. Rear Engine Aux Fuel Pump (Right side only) - ON5. Rear Engine Throttle - FULL OPEN then CLOSED then CRACKED (open just a bit)6. Rear Engine Aux Fuel Pump - OFF7. Rear Engine Mags - START8. Rear Engine Throttle - SET RPM's to 1000 once engine is started9. Repeat 3 to 8 for front engineThat should have you going. Give that a try and don't skip any steps.

that was great, it worksthanks