I've written a VFP8.0 application that uses HTML help. The help file is a compiled html help file. I use the command Set Help to "xx.chm". I have this program installed on my development machine and when I press F1, or invoke help from a menu, the HTML comes up fine with the correct context. I've installed the same application on another computer, but the help will not activate. Both computers run WinXP and both have all the required files. Does anyone know why this might be happening and what I can do to correct it. It seems strange that help would work correctly on one computer and not the other. Thanks in advance for your replies and help.