Hi, I have 2 pc's in a netwerk and a SMC router (4 ports and Wireless) Both computers are connected to the Router with cable and wireless. From Both computers I can acces the internet (Router is also gateway) So I have 4 IP-adresses: - XP 192.168.200.100 (wireless) - XP 192.168.200.103 (LAN) - W7 192.168.200.101 (Wireless) - W7 192.168.200.102 (LAN) When I do a ping from the XP pc to the windows 7 PC (..101 or 102) I get a reply from the network adapter of the WIndows 7. But when I do the same on the Windows 7 PC to the XP pc (..100 or 103) I don't get a reply. Why ??