custom message form - view code throws error

hello
I've customized Outlook 2003 message form.The form has some
vbscript.On one of the client the form script is not working.When
"View Code" button is clicked it is displaying error "Unable to load
this feature.The operation completed successfully".The form is
published in Personal forms library & Send form definition with item"
box is unchecked while publishing the form.The form has some textboxes
& commandbuttons.The form is published by clearing cache.The client
operating system is not known.(as searching I found Win server 2003
operating system +Office 2003 may give the same exception) .What
might be the reason behind script not running?
The client facing this problem has Office 2003 sp3 installed.On other
clients with Win XP + Office 2003 sp3 there is no such problem.

Thanks