>>Is there a line in the exe which says
>>
>>set help to usbu.chm
>>set help on
>>
>>just in case... I figure the help is set to your .chm in the config.fpw, and that set("help")="ON" by default, but it doesn't hurt to check for the usual suspects first.
>
>In exe
>

>SET HELP ON
>x_R1=c_HomeDir+'Help\usbu.chm'
>SET HELP TO &x_R1
>

>x_R1 evaluates to a valid path of c:\usbu\help\usbu.chm
>
>Do i need to set help to usbu.chm in Config.fpw as well?

The above should be enough... just to make sure that there aren't any oddities with the path (macros with spaces or other funny characters, double or missing backslashes), can you try this:

c_helpdir=forcepath("help",c_homeDir)
x_r1=fullpath(forcepath("usbu.chm", c_helpdir))
set help to (x_r1)