CUPS and Kerberos - Problem with Authentication

[Timo]

> You need at least MIT Kerberos 1.6.3 or any version of Heimdal.

Ok, now I installed Heimdal Kerberos 1.2.1 and still get the same error messages:

D [21/Jan/2010:08:17:07 -0100] cupsdReadClient: 9 POST /admin/ HTTP/1.1
D [21/Jan/2010:08:17:07 -0100] cupsdAuthorize: No authentication data provided.
D [21/Jan/2010:08:17:07 -0100] cupsdReadClient: 9 1.1 CUPS-Add-Modify-Class 1
D [21/Jan/2010:08:17:07 -0100] CUPS-Add-Modify-Class ipp://localhost/classes/a
D [21/Jan/2010:08:17:07 -0100] cupsdIsAuthorized: username=""
D [21/Jan/2010:08:17:07 -0100] Returning HTTP Unauthorized for CUPS-Add-Modify-Class (ipp://localhost/classes/a) from localhost
D [21/Jan/2010:08:17:07 -0100] cupsdSendHeader: 9 WWW-Authenticate: Negotiate
D [21/Jan/2010:08:17:07 -0100] Script header: Status: 401

The ticket credentials are not passed to CUPS