Thank you guys i appreciate the help!   
I will check all this items, and I'm sorry I forgot to mention my Power Supply :music_whistling:   
I use a Seventeam ATX 750W V-Force, I think that this psu is enough for my system. 
The strange thing is that this only happens with F15c. I can fly A10C, P51 and other birds without problems, but anyway I will check my psu.   
any idea what might be, please let me know   
Regards