Hi! I use a 'clear' WinXP to run the Supervisor Runtime. The all of activeX checkboxes disappear in RT, and there's no error message. Installing the developer on the target PC and open the project, the checkboxes also disappear from the screen, but in the workspace window can be seen - without any properties. Clicking on any of them - in the workspace window- a system message appears : 'Can't start the external application.' Any idea what it needs?