I use 2 pc's, and have different OS that's XP and win2003. At first installation, I try sharing file from XP to win2003, or win2003 to XP and all seem right without problem. At some time, I change my IP address to connect to internet, and then I don't know what happen, I can't share file from XP to win2003. But share from win2003 to XP has no problem. Can someone resolve my problem? I need it.. thx's...