ipv6 connectivity

I have had my dell for a little over a year now. I have another asus laptop and a built desktop. I had every computer connected in the homegroup but now it does not seem to work at all. It says the ipv6 connectivity is not enabled, in the adapter it says it is. Any help would be appreciated. I also installed the new adapter driver and it still does not work.

Dell Insperion 17

intel I3