Installing a second NIC in Server 2003?

You give too little information unfortunately. If my reply does not help you further, feel free to send me a message with additional information. I ume that the second NIC is supported under Windows Server 2003. If so, installing the drivers is all you need to do. When a NIC does not have a network cable attached, it will auto ign itself an IP address in the 169.x.x.x range, which is most likely what has happened in your case. Have you verified if both NIC's still work? They most likely simply do. If you have Windows Small Business Server 2003, adding a second NIC will only enable your server to act as a gateway, it will not double your bandwidth to your server. If you have a normal edition of Windows Server 2003, a second NIC does double the bandwidth.