Figured it out.. the software writes to an INI file saving the last size and position of the applications windows.. since moving it to terminal services all users were using the same INI file.. so if a person with a large monitor (high resolution) would use the app on the far right side of their screen.. when they closed the app it saved that position, then when the two users with smaller monitors (resolutions) opened the app.. it was actually opening some or all of the windows off the monitor and they could not see them..