Client computer has vfp 7 runtime installed.

I copied the following files to client computer:

myhelp.chm
hhupd.exe
foxhhelppps.dll
foxhhelp.dll

and ran

hhupd.exe
FOXHHELP /regserver

I issued
SET HELP TO myhelp

However, from VFP 7 exe file, HELP command does not work.
Why ?