There are two possible causes for this issue:
1. PowerPoint display option was not set correctly
Click to highlight the PowerPoint presentation in your playlist, then click on "Options" button to bring up PowerPoint Option box. Choose "Fill zone exactly" to make PowerPoint slides occupy the entire screen when exported to media player.
2. Microsoft .Net framework or PowerPoint 2003/2007/2010 program was not working properly
Manager Express requires .Net framework and PowerPoint 2003/2007/2010 to be properly installed on your PC in order to export PowerPoint presentations to your media player. Please reinstall Microsoft .Net framework. If reinstalling .Net still does not fix the problem, please also reinstall Microsoft PowerPoint.
Microsoft .NET Framework 4 (Web Installer)