BI 4 Sp2 SSO setup

Hello,

Installed brand new setup with BI 4 SP2.

Configured for windows Ad authentication and it works.

Configured SSO as well.

Issue is WIndows AD manual login ok, somehow SSO is not working. When we enter Luanchpad URL, it is trying something and then prompting for windows login id and password. Tomcat logs shows credential obtained and i am able to see my id in the log file as well.

No error in stdout file.

Any help on this ?

Thanks!
Raj