Add-On Aircraft panel.

I have a preference to save my default M$FS9 aircraft with a Cold and Dark Cockpit. I have experienced that when I create a flight with an add-on panel/aircraft, the engines will not start using the normal ignition switches on the panel, unless I first start the engines with CTRL+E and then shut everything back off and save that particular flight. Everything is fine on a reload and the panel works correctly with engines igniting using the panel switches provided. So my question is: Is this a quirk in FS9 or is it a coding problem in the add-on panel? If it is the latter, does anyone know how to add some instructions to the aircraft.cfg or whatever to alleviate the problem?Jon