I reverted to older manufacturer drivers and then made i repair in P3D installer and it is working great!!!
I did a flight from LLBG-KLAX about 14 hours in night and worked perfectly!
I did also flight from KLAX-KJFK 5 hours flight and worked great!
Also the graphics looks great, but now i installed latest drivers from NVIDIA and i didn't check the simulator again - Do you think it will work good now?
Thank you so much!!!! You helped me so much!