SSO for Java not working

Hi,

We have configured the Secure login Server and enabled the SPNEGO. We are getting the certificates and able to fully get the features of X.509 and Kerberos functionallity in ABAP.

However in the case of JAVA stack it is not taking the windows authentication and logging in instead prompting to enter the user name and password.

Any help  on this is appreciated.

Regards

Mukunthan