Are you making them Online (all people from all over the world can play there) or LAN?
also
is this the clientinfo.xml that PC0 and PC1 use? if so, change it to:
-If your server is online (people from all over the world can play there), change to your WAN IP
-If your server is a LAN-only server, then assign the LAN address to your both Computer and Router. then, change the 127.0.0.1 to your computer's LAN IP