SPNego on Portal 7.4 doesn't work

Hi Gurus,

I just finished the steps for implementing SPNego on our Portal server 7.4 on Linux machine having user storage on MS AD. I followed the steps starting from modifying datasource conf file for kerberos till running SPNego wizrd as described in the documentation (1488409 - New SPNego Implementation).and 2029432 - Spnego wizard walkthrough for 7.3/7.4 netweaver versions but at the end it failed. It didn't give me any error message but on hitting the url it simply displaying the login page that it used to display before.

I am attaching some screenshots for review.

I will appreciate for any help here.

Thanks