samba - May 2005 - A problems wiuth https ?

Hi

into my logs, i see :

1115139337.500   5264 192.168.37.140 TCP_MISS/200 12633 CONNECT 
www.creditmutuel.fr:443 MIRAN DIRECT/193.57.116.139 -
1115139337.852   5634 192.168.37.140 TCP_MISS/200 495 CONNECT 
www.creditmutuel.fr:443 MIRAN DIRECT/193.57.116.139 -
1115139338.059      5 192.168.37.140 TCP_DENIED/407 1751 CONNECT 
www.creditmutuel.fr:443 - NONE/- text/html
1115139338.427      5 192.168.37.140 TCP_DENIED/407 1751 CONNECT 
www.creditmutuel.fr:443 - NONE/- text/html
1115139338.464      5 192.168.37.140 TCP_DENIED/407 1751 CONNECT 
www.creditmutuel.fr:443 - NONE/- text/html
1115139338.471      5 192.168.37.140 TCP_DENIED/407 1751 CONNECT 
www.creditmutuel.fr:443 - NONE/- text/html

I use winbind ntlm auth and i have two questions for know :

1- Why this TCP_DENIED ?
2- Why i lose the username "MIRAN" ?

Thanks bye