I am having problems starting various Aircraft in FSX.  I have my Saitek Yoke Buttons programmed to start (Ctrl-E) but many of my newer downloads from Simviation will not start the engines.  If I start with an good a/c them change a/c through my FSX menu, everything works fine.  This leads me to believe that I may have a Saitek software glitch.  Anyone else ever experienced this?