I have a network running quite happily for ages now,4 PC'S running win 2000 using internet connection sharing on a broadband connection,using a hub.I now want to install a ADSL Router(Mentor),I have managed to get it to work with two of the PC's but for some reason the other 2 PC's can't see the router or any of the other PC's and the two relevant network port leds on the router(also a 4-port switch)flash rapidly.The router has DHCP assigned to the LAN side,I have even had a HP Laserjet printer networked off the router working along with the 2 PC's that will work.If I put everything back the way it was without the router,just using a hub everything works without any problems.Any help would be much appreciated,thanx in advance.