I have a Motorola Surfboard to access the internet via Cable modem. I have 3 different PC's in my house but only one of them is connected at a time, i have no switch or hub. With the first two, i have no problem connecting and accessing the internet, i just plug the PC's ethernet cable to the surfboard and surf the web. however when i switch to the third computer which is the new one, i get a message: network has limited or no connectivity. the settings on the 3 PC's are identical, DHCP, and everything automatic. somebody told me that it was due to a MAC address table that the modem keeps on its records. i think there is a MAC address number limit, which would be only 2 in this case, but i don't know how to access it or erase it, and how to allow the 3 PC's to access the internet and not having to erase it each time i want to connect a different PC. please help!!!