I need help setting up my new MacBook Air to access a PC running Windows XP using Remote Desktop Connection that came with my version of Office 2011. I use an Apple Extreme wireless router. When the computer MBA and PC are connected to the same network I can successfully connect to my PC. When both computers are not on my network I have problems. On my Apple Extreme the router mode is DHCP and NAT. Under DHCP Reservations I have set up the MAC address of my PC and its IP Address. In Port Settings I have added Remote Windows Desktop using the default Port # and the PC's IP Address. I have tried both the IP Address and computer name in the RDC screen but I still cannot get connected. Any suggestions on how to get it working are appreciated.