Hi Sanal.

Have you tried doing a reinstall? Or maybe even get a new link and download the 707 v1.2 again to see if that fixes up the ACE issue. Even with my i7, 8GB DDR 1600 and nVidia GTX 470 with 1280MB GDDR5 memory, I get the flashing graphics sometimes, it is only when using the full cabin.

If ACE isn't doing it for you. Try changing the model.cfg in the model.b and model.adv folders. The changed parts are bold.

model.b. from this:
[models]
normal=..\model\csx701_320b
interior=..\model\csx701_interior

to this:
[models]
normal=..\model\csx701_320b
interior=..\model\csx701_interior_light

model.adv. from this:

[models]
normal=..\model\csx701_320adv
interior=..\model\csx701_interior

to this:
[models]
normal=..\model\csx701_320adv
interior=..\model\csx701_interior_light

Hope this helps.

Mark