Network Problems I run Mac OSX with my airport extreme card. We have a wireless network with tiscali broadband. I have about 4 other computers on the network (not all used at the same time obviously ) However they seem to be able to hold the IP address and keep it the same. My mac however likes to chop and change between my IP, causing no internet! ...Is there anyway at all i can stop it changing so i can stay with the IP i want!