I have a Windows 7 computer and a Mac running Show Leopard on the same network. On my mac I can see the Windows machine and be able to see and play music off of that computer. The Windows machine does not show the mac at all. I've reinstalled iTunes on Windows multiple times, turned on and off my firewall and antivirus programs and nothing seems to work. Any ideas from the crowd? I have an Airport Extreme router too. Any settings on the router that I should be looking at?