Ice Buildup, Then what? (posted again)

Hello All,
I am posting this a second time because the one I posted last night seems to have disapeared!
My question is....does FS2002 take into account ice buildup on an aircraft?
The reason I ask is that I was flying my Baron over the Rocky Mountains and then suddenly it rolled to the left and started to nose dive!
It was all I could do to level out and start climbing again so that I could get over the mountain that was right in front of me!
The only thing I could think of as to why this happened, is that the temperature was -15 degrees Celcius at the time. After that I actived the de-icing and the rest of the flight was ok....
So DOES FS2002 take into consideration ice build-up and will it react accordingly????
Thanks!
I am posting this a second time because the one I posted last night seems to have disapeared!

My question is....does FS2002 take into account ice buildup on an aircraft?
The reason I ask is that I was flying my Baron over the Rocky Mountains and then suddenly it rolled to the left and started to nose dive!

It was all I could do to level out and start climbing again so that I could get over the mountain that was right in front of me!

The only thing I could think of as to why this happened, is that the temperature was -15 degrees Celcius at the time. After that I actived the de-icing and the rest of the flight was ok....
So DOES FS2002 take into consideration ice build-up and will it react accordingly????
Thanks!