What needs to be done on my Network to add a PC to my Class A network with a 10.130.1.x IP address. I am currently using 10.130.0.x addresses but will be running out of those soon. I added a system to the Network using a 10.130.0.x IP address. I changed the IP address to 10.130.1.x but it looses connection and I cannot see the network. Is there anything that needs to be configured on my firewall for this to work or to configure my 2003 AD Server?? Help.