Main screen black

Since a few days my main FSX screen acts strange: when I start FSX the default Trike is displayed but as soon as a choose an aircraft the selected one pops up for a second and then the screen turns black (though there's still the mouse-button as a hand that allowed turning the aircraft when selected).
See here
Anyone had this problem or knows a solution?!
Thx
See here
Anyone had this problem or knows a solution?!
Thx