Hi Bryan, i still found another Thread with this problem but still no answer. It works when i start the flight with the Cessna,and switch than to the iFly.Maybe that can help by finding the problem.I not running any audio programms.But tomorow i will try the Windowed Mode. Another Problem is when i started it via the Cessna,any Command i gave the marshaller bring the Simulator in Minimized Window and the MARSHALLER OPERATIONS DIDNT WORK. I give new information as available. Thanks and Good Night x)