So i'm trying to play LAN with my brother. We are in the same house on the same internet connection. Lan does not work at all. We are both in version 1.4.5. When we try to connect nothing shows up and if we open to LAN we get an IP that is always 0.0.0.0:(random numbers) I attempted to use my computers IP with the numbers after the colin at the end. Nothing works. I enabled java through the firewall and to be able to be shared. My computer is a Windows 7 and his is a windows XP, does that have anything to do with it? I just want to know what to do to fix it.