My Dimension 4600 gives me the message:  Local Area Connection Network Cable Unplugged.  I purchased this computer in January 2004 and I have always received this message.  It hasn’t been a problem as I used the USB instead of the Ethernet connection.  However, now I am trying to go wireless and it wants the Ethernet.  The devise manager says the Ethernet card is working fine.  I installed a different Ethernet card and it does not recognize any new hardware for it at all.  Any suggestions on how I can get this to work so I can go wireless (I do not have a wireless card in the computer) would be appreciated.