Hi, I have a strange problem: When I assign addresses of the form 10.0.0.x to my computers, file sharing (smb) does not work. When I assign them addresse of the form 192.168.1.x it works... OS is XP SP3, for subnetmasks i tried both 255.255.255.0 and 255.0.0.0 Any ideas what I can do? [EDIT] I forgot to add: pinging doesn't work either