Can't Change Password for Web Site Administrator

I have a number of subwebs that have different administrators runniing IIS on 2003 Server in an internal network. The option to change password is grayed out in FrontPage for all the subwebs and on over 100 computers running FrontPage 2002 that we have tested so far no other server security options are grayed out. They can log into the Adminstrator home page on the IIS Server but there does not seem to be any place to change their password. It is important that they be able to change their passwords. All users were added to the users account on server and made administrators for each of their sub webs. The Web Server is configured with FrontPage server extensions and is running ASP and ASP.net. Everything else on the web server seems to be running fine.

I found a work around where they can create a new user with a different username and password make them an administrator and then delete the original administrator. The problem is most users would prefer to keep the orignal username as it corresponds to their other logins and when they try and put back the original username again after deleting it gives them an error that this user already exists. In addtion it would be so much easier if they could just change their password.

This sounds like a frontpage question (that I don't know the answer to, sorry). Maybe a FP site like www.frontpagewebmaster.com would have some help.