Draconus,
Thank you so much for replying to my problem. You were right about the Mig/Su missle fire... I had to hold the button longer. ( I am still a noob ) Anyway I tried again with the F15 and all the buttons and everything I have mapped for that plane. But It still does not work... I even deleted the Flight controls for keyboard In the hope that it would use my Thrustmaster stick as flight stick but it did not work
I also rescanned my devices again and DCS reads my Thrustmaster Stick just fine, as I said I can use it in every plane to fly and maneuver except for the F15. Hope I find a sollution soon because I want to fly it really bad haha. All the other button mappings for the F15 work just fine, ( landing gear up/down, Radar on, ECM on, Different Bore modes, trimmer controls etc).