Need help?

Since I have a new Windows7 computer, my bombsights don't work. However, the mosquito guage used in the B-17 Norden Bombsight works. But when I tried to install it on the Alpha B-17D, the sight works perfectly, except my main panel covers the gunsight like it is off center or enlarged. Is this windows7 or what do I need to do to correct this? Any help would be appreciated!

Braveheart