So far the advice given is accurate, this should get the new IPV6 working...
However; there might be reason to not want it working --and why it isn't.
As I mentioned earlier older routers will sometimes puke on the new packets. But I notice you have an XP based machine on your lan. If you plan to share files with mixed OSs; 7, XP, Mac, Linux etc. you won't be able to use Home Networking. The other OSs don't know about IPV6 at all... These are strictly IPV4 OSs, XP isn't going to be updated and the Mac and Linux ones will probably stay that way for quite some time. (Until the internet broadly adopts IPV6, at least)
If you want to get everyone talking to everyone else and sharing files, printers etc. you will need to switch over to a Work Network and use the old style Username/Password style sharing scheme.
This is because, so far, only Win7 understands IPV6 and Home Networking is strictly a Win7 protocal.
The good news is that Work Networks (Workgroups) have been around a long time and generally work without error once properly set up... I went through this on my own lan, went back to Workgroups and it hasn't missed a beat since...