My company has some custom forms for use in outlook 98 that are available to
all users on our network via the contacts folder of a shared mailbox.  These
are working fine on most pcs but there are two that are refusing to display
the custom forms correctly.  We run windows NT and outlook 98 both pcs are
displaying the message installing form on machine and then come up with the
message"the custom form could not be opened.Outlook will use an outlook form
instead".  

I have tried deleting and recreating the frmcache.dat file in the
C:\winnt\forms directory and even replacing it with a copy from a working pc,
as this worked fine for other pcs when confronted by this problem.  I have
also tried reghosting the pcs with our standard build to reinstall the
software but these two are still displaying the same error message about the
form could not be opened.  

Unfortunately upgrading the versions of windows and office is not an option
but I know the forms can work with the versions we are running as they work
on other pcs ok. Can anybody help me to get these forms to display properly?