password prompt doesn't appear if user tries with wrong ldap password in php
<p>I'm trying to authenticate my domain users against my the ldap directory of my company and using ldap_connect() and ldap_bind(). If users enter correct username and pass, it logs on the users into the system. 
But, if users forget to enter the domain name (in the form username@domain or domain\username) or tries with a wrong password, the browser doesn't prompt for the credentials for the next time (even if user tries by reopening browsers, clearing cache etc.)
what I'm missing, please suggest</p>
