Must change password at next login.

Sorry if this is the wrong forum. Let me know if it is please.
Anyway.
I have a Windows 2008 domain. If I set the flag for a user "User must
change password at next login", it works perfectly if the person is on XP,
but if they are using Vista, the dialog to actually key in your new pasword
never displays. They get the message saying that the password must be
changed. Typically you click ok to that and you get the dialog to change
it. Instead on Vista workstations it just ends.

All updates are installed.

Any ideas?

Thanks,
John