I've got two WNR3500L routers setup in my home.  The main router is attached to the modem and a 1000Mb switch that connects my office equipment (file server, test systems etc..).  The second router is connected to the first router via a stretch of CAT5 through the attic.  The two routers have identical wireless setup on seperate channels (main on channel 1, second on channel 11).  This allows me to roam freely through the house without a dropout.  The second router is also set to pass all DHCP requests to the main router.  Recently I setup my main router to support my IPV6 tunnel through Tunnel brokers.  It works great, every machine in the house now has IPV6 automatically.  Strangely though after setting up the tunnel my power LED has gone Amber and all my wireless clients only connect to the second router.  The wireless is working according to the router.  It sees other routers in the area, but it never shows a connected client.  I'm running Kong's firmware which has always ran perfectly for me.  Any ideas on what happened here?