How have you configured the update server behavior? You will need to ensure that you are updating the currently logged in user, if you created the pages with Security Assist the user's id should be in a session variable that is used to identify the user. To update the users password you will need to apply the sha1 formatting to the posted password value that is specified in the update server behavior. Please describe how you have it setup currently and include a copy of the page in question in a zip archive.