@franciscosilvabar,I'm flying a free b737, because I built a 737 cockpit, so I need a model of that plane, it worked perfectly on p3dv4
That is important information that was not mentioned in your first post.
You could review / run through all the General Debugging Steps :
https://www.prepar3d.com/forum/viewtopi ... 2&t=123246
If P3D does not work on your setup:
P3D return policy 14 day money back guarantee: