[otrs] Why when NTLM succeed on verifying the user, it went to the login page?

Hi, I recently started to try OTRS on LAMP. While integrated it with windows AD, I got a problem. Everything seemed fine, NTLM log showed that the user inputed from the popup box was verified. Then, the login page appeared. I think if the user was OK, the it should go to the main page directly. What did I do wrong? My configuration is following: http://wiki.otrs.org/index.php?title=Implementing_Single_Sign_On_on_Linux_wi... http://wiki.otrs.org/index.php?title=Using_OTRS_with_Active_Directory_as_a_s... -- 竹密岂妨流水过 山高哪阻野云飞