I have this weird problem. When I start the simulator, everything is ok. Then, after some time (haven´t figured out how much, but no more than 5 minutes - sometimes I even have´nt finished the taxxing) the F1, F2, F· and F4 keys control only the LEFT engine, zero control on RIGHT. Anyone know why does this happen? and how to correct it? I really like challenges, but trying to takeoff with just one engine with a twin engine is a royal pain in the you know where...

Or, even better yet.  Buy a CH flight yoke USB.  Expensive but well worth stashing up for if u can't just get one off the cuff.  Actually, save enough for the rudder pedals to though, the gameport rudder pedals by CH are reasonalbe price as well as the set thrustmaster makes.  Less expensive, but equally nice in the stick line is the saitek X-45, stick and throttle combo, which has rudder rockers on the throttle grip, or the thrustmaster afterburner stick and throttle combo which has rudder rockers on the throttle also and the the stick twists as well.  Half the price of the X-45 but less buttons.  I have the CH yoke/pedal combo and the thrustmaster afterburner but I'm saving for the go-flight throttle or the new quadrent from CH if its released till I have the price.  If you get throttle controller, fsuipc is a must. Still a few freeware versions of that around the net. Good luck.