host 1.1 and black screen

I have the following problemstart up host 1.1 for a session and fly.as soon as I land and the wheels hit the ground my screen gets black and accordingly it disappear in the taskbar.you hear the engines running because fsx is still on but it is in the taskbar and by clicking on it I dont get it back on the screen.i have full view and have 3 monitors 24 inch on 3th to go.any help would be appreciated.