Squid Authentication Window Keeps Popping Up

[MadCatZA]

Hello

Platform: pfSense 2.3.2

Ive setup Squid to use LDAP authentication against my 2008 R2 server. Everything works fine, however there are times I get prompted to put in the username/password multiple times before the authentication window in Internet Explorer dissapears. Could anybody advise or assit please? Ild like to roll it out for staff, however they won't grasp having to put in there username and password multiple times until it dissapears, theoretically it should only need to be done once during a login. Thanks in advance, configs below;

[MadCatZA]

Over 70 views and no responses, how sad… Nevermind, ive switched to Captive Portal with Radius Authentication.