Problems with Install Shield Express Delphi Edition - Installing fonts

I've written a program that needs special fonts to run correctly, so I've
setup IS Express to copy the font files to <windows>\fonts. But after the
installation routine of the program finished on a pc that haven't got this
font files, this font files aren't available. But when I go to the "FONTS"
directory an presse the "F5" button then the fonts are installed.
What can I do to automate this?

Thanks for your help,