fsx problem with the zoom mouse wheels

so guys i have a serius problem with the fsx view that make me almost impossible to play as i can t zoom as wanted in the cockpit. The problem is that when i use the mouse wheel for zoom pressing sbacebar instead of zooming in and out from a fix point , the view slew trough the entire cockpit as result wheni zoom out the view pass trough the cockpit seat and when i zoom in the view goes trough the glass , and also it doesnt show me the decimal indicator for the zoom , es 0.50 ecc. If someone can help i would be very grateful and also i have tried evrithina also reinstalled the game thank you.