Digest Access Authentication

slednija HTTP Response praten kym IE 6.0 syzdawa nyakakyw problem, zashtoto browsera ne razbira che se iska digest access authentication:

HTTP/1.1 401 Authorization Required
WWW-Authenticate: Digest realm="ala bala",nonce="Mi80LzIwMDMgNTo1MToxNCBQTVg4Y2ExNTUwODI2ZDIxMzJjZWUwM2MwMDU5NTg2ZTMyMw=="


nyakoy da ima idea kakwo e greshno w responsa?