Error in joining samba server to Windows Domain

[Chan Jesse-CMC082]

Hi,
        I've installed samba 2.2.3a on HPUX11.0 and are currently trying to join the 
samba server to our Windows Domain... However, I encountered this error :

Error connecting to *SMBSERVER
Unable to join domain XXXX
        
        Has anyone encountered this problem before ? What was the solution ?

thanks & rgds, 
Jesse Chan