If Scan-X is not working with CADI you can check the following.
1. Open CADI > Click on Options > Setup > X-Ray AT ScanX (on the left index) > Click on the Interface tab.
2. In the Direct DLL mode (active tab=mode selection) tab check the following
Make sure that the Dll Path is C:\Program Files (x86)\Air Techniques\ScanX\Update\
Make sure that the Dll FileName is VistaScan.dll
Click on Save Changes
3. If the above does not work you can select the ScanEasy Mode (active tab=mode selection) tab and click on Save Changes.