I have a Windows 2003 Enterprise Server which runs terminal services. I also have a Canon muti-functional device imageRUNNER 5020 that I want to use it as network scanner. From this 2003 server I installed the TWAIN driver for the scanner and I could discover it and it showed available for scanning. When I used Acrobat 7 Pro for example to create PDF the driver was not available to select, this issue is happening to Word03, Photoshop CS2 and many other TWAIN compliant applications but Kodak Windows for Imaging. If I uninstalled terminal services then everything works fine. My questions are why Kodak Windows for Imaging work in this scenario and others don't and why does terminal services suppress TWAIN drivers? Keep in mind that I am working on the server locally.