OWA not prompting to change password

We have Exchange 2010 sp2.  CAS and DB roles are on seperate boxes.  We have enabled some new users to require change password on first login, but OWA does not prompt.  It only gives the message that username or password is incorrect.  I have tried this already http://technet.microsoft.com/en-us/library/bb684904.aspx and read many articles about it, but still not working.

Thanks,

David