I have 6 XP machines and one linux Fedora machine. At the first boot the Fedora box saw the windows machines and I could drag a file over np. But now it can only ping them

. In Gnome i click on the Network icon and nothing happens at all!
Please help! I am running FC7 or FC6 I am not sure which because the "About Fedora" button crashes when I click on it but it was a Mythdora 4 install