search for: administract

...------------------------- Here was the problem! so I search the registry, and found the metioned registry is related to the "Domain member: Digitally encrypt or sign secure channel data (always)" option. The solution is to chenged the option to "disable" in Control Panel -> Administractive Tools -> Local Security Policy -> Local Policies -> Domain member: Digitally encrypt or sign secure channel data (always) Then the XP allow me to log into samba domain happily~ ^_^ Hope you would find this helpful