[otrs] Otrs 2.3

hi, i installed otrs 2.3 beta 2 b/c it has some features like imap/ajax that are important to us. i used the same lines that i put in con fig.pm for otrs 2.2 to authenticate against Active directory but this version is giving error that your user name or password was entered incorrectly. my last version was 2.2.6 and it worked with AD. i am also sending my otrs.log file. Any idea waht is wrong? or i am doing something wrong. Thanks