See mskb #Q194196 for possible solution.

>I have successfully created a help.chm file for my application, and it works great if I run my app on my machine, works with context help, etc...no problem.
>
>But when I install the program on another machine...nothing happens when we call help (i.e., help ####, where help is a context id, and nothing happens when I just call help--having already "SET HELP TO" the help.chm file), I get no error message, nothing.
>
>I have tried running the HTML help install (hhupd.exe) on the other machine... and its already running IE 5.0. I've tried installing hh.exe, Hhctrl.ocx, Itss.dll, Itircl.dll (as described in help) through installshield, but no change.
>
>Has anyone had these same problems using compiled HTML on their apps? What do I need to look for? I am using installshield express 2.13, and can install any dll, ocx, etc. to make this work...does anyone know what I'm missing?
>
>Thanks in advance.
>
>Bob Bartel