American Airlines Virtual

Hello captains Question for you. I have aerosoft airbus. Windows 8.1. IntelCore7 NviaDia GEforce 840M. My fps is good on fsx. One issue however. Sometimes when fly the Airbus the fps is fine then suddenly once I hit I don't know if its turbulence or some areas in fsx. but the the fps will suddenly drop and the plane can easily just go out of control such as nose diving or a wild bank in either direction and its hard to recover. In addition the fps would drop down to 1.0. Its ridiculous. Does anyone have any suggestions. I use Active Sky Evolution. Brand new laptop as well.

I have the Aerosoft Airbus Extended and it is modeled very nicely. I'm not a fan of the Airbus in general but this one is a good a/c.