SDP 8017 "Pass-through" Authentication Problem

SDP 8017 "Pass-through" Authentication Problem

Hello.
I've installed SDP 8017 on Windows XP Pro in my local domain.
But i didn't find any solutions for "Pass-through" Authentication.
Import requestors from AD works fine. Authentification from AD also works perfect. Pass-through authentification option enabled successfully (computer account on DC is created and password to it set right). But then i try open SDP URL in browser apear a window with login/password request thereafter follows redirection to login page.

SDP 76011 with the same parameters and wich used the same computer account for auth works fine.

Any ideas?