My PC's MOBO is ASUS P4P800SE installed with the lasted driver.The system is Win2000 Pro SP4,and IP is distributed automatically by a DHCP server. Gigabit device is visible,can be enabled or disabled,and the parameters can be set for the driver throngh device properties. I'm sure that the cable works well,and no conflicts are repoted.But the state of connectting stays "Network cable unplugged",and in Event viewer the message description is "Port A is down".I tried other PCI NIC,all the same. I remember I updated the driver of BIOS before appearing of the problem.Is anything related to it? Thank you in advance.