We are using AutoCAD 2009 with GTX RasterCAD to edit our raster files. I am running on a Lenovo work station with Windows XP Professional. I have 3 GB of RAM and a 2.83 GHz processor. Everything was working fine Friday when I logged of but today when I opened it there was no Ribbon. All I get at the top of the page is the following message "The Ribbon does not have any tabs or panels currently attached". I can type the commands, either AutoCAD or GTX RasterCAD,and they work fine. Does anyone have an idea what happened to the Ribbon?