>It is important to use server-side COM objects in ColdFusion, that is, they should not have a graphical user interface. If you invoke an object with a graphical interface in your ColdFusion application, a window for the component might appear on the Web server desktop, not on the user's desktop. This could tie up ColdFusion server threads and result in further Web server requests not being serviced.

In addition to Erik's comments, you'll also want to set Sys(2335, 0) for "unattended mode". The help file has more information on this function if you need it.