Authenticate using remote LDAP server

I have a Domino 6 server set up to use multiple server SSO with Websphere. I have the Web SSO configuration and have set up a directory assistance entry to point to the remote LDAP directory.

I can use this successfully when accessing the application via Tivoli Access Manager, but when I attempt to login directly to the domino server I am continually prompted for the login screen. I log in (using ldap username), and then I am presented with the login screen again.

I am using Internet sites, and anonymous access is not allowed.

This is happening regardless of the database I am attempting to access, so I have ruled out ACL, or group membership problems.

I feel like I am missing something simple, any ideas would be appreciated.