reply to Mike Wolf
Might sound silly but have you tried a different computer? It could be an issue with the operating system itself?
what were their operating systems?
reply to jkj860 Many Netgear routers are having issues with ipv6 not working correctly. Try contacting their support directly, they will work with you try to resolve the problem »my.netgear.com/myNETGEAR/support.asp