samba - Aug 2007 - How Can I Stop Certain Passwords from Expiring?

I recently started using pdbedit to set the maximum password age policy on
v3.0.25a.   How can I
set certain passwords so they don't expire?  I have been trying the folowing
command but I can't see
that it is doing anything:

pdbedit -cX -u root

It returns the stats for the root user, but the password appears to still be set
to expire?
How can I accomplish this and how can I verify that it worked?


Thank you in advance.