Hi. I previously had the demo ribbon installed and it worked with my application. I recently upgraded to the fully licensed version, followed all the install steps, and got it to work on multiple Windows XP boxes. However, when trying to get this to work on a windows vista box, I still get the "Your evaluation version has expired" screen when trying to bring up the application. I have removed the demo and re-added the references in my project. Has anyone else had a problem with the ribbon and Vista? Do you know what the problem may be? Thanks.