DraftSight Startup Error "Entry Point Not Found"

Hello All,Thank you in advance. I have installed DS 2015 on a laptop computer running Windows Server 2008 Standard. I have AutoCad 2002 installed as well.When I open dwg file in DS2015, I get an "Entry Point Not Found" error. I attached a screenshot of this error.Also, my mouse is very jerky "only" on the working area. I have up-to-date video drivers.Any links or help will be grateful.KenJG