What is causing this screen problem please?

What is causing this screen problem please? I look short and fat in the sim 
It happens when I fly this Volksplane model, and I'd like to be able to fly this plane as I have a real one under restoration at the moment.
Default screen res on my SP1 FSX is 1280x960x32 on a CRT monitor, the black area should not be there, and it doesn't appear until I choose the Volksplane.


It happens when I fly this Volksplane model, and I'd like to be able to fly this plane as I have a real one under restoration at the moment.
Default screen res on my SP1 FSX is 1280x960x32 on a CRT monitor, the black area should not be there, and it doesn't appear until I choose the Volksplane.
