This latest security update patch from Microsoft means that active content can no longer be run in Internet Explorer (no external .chm files can be called). You can find out more information about this at http://www.microsoft.com/technet/security/bulletin/MS05-026.mspx and http://support.microsoft.com/kb/896358. I had to restore my Windows XP system to a previous state in order to execute compiled .chm files on my machine. Has anybody else on this group experienced similar issues? ------------------------------------ Mick Washbrooke Technical writer Tel: +61 2 9690-7432 www.citect.com