[Samba] Printer in Win2k

[samba_list]

 Hi,                                                 

 There are two Win2k boxes on my network that are experiencing long
delays (more than 10 minutes) when someone try to print something on
my             
Samba-shared printer.                             
 I´ve configured smb.conf with security = ads option.       
 Below are some log file lines that report errors on the
authentication:                                 

[2004/01/12 17:05:08, 1]                            
smbd/sesssetup.c:reply_spnego_kerberos(218)         
Username FSADM02$ is invalid on this system       
____________________________________________________________
 [2004/01/14 10:28:49, 0]                           
lib/util_sock.c:get_socket_addr(919)                
getpeername failed. Error was Transport endpoint is not connected    
                               
------------------------------------------------------------    
[2004/01/14 10:28:49, 0]                            
lib/util_sock.c:write_socket(413)                   
write_socket: Error writing 4 bytes to socket 16: 
ERRNO = Connection reset by peer                   
-------------------------------------------------------------
Why is the station trying to log in using its       
computer name instead of user ? Why all computers   
on my network are working fine with Samba but these 
two are not ? 

Thanks for help.

Lindolfo Rodrigues