Need help to stream media without using Media Center.

I like to stream my music to my xbox360 just through the normal xbox interface. I hate going into media center so I usually just enable media sharing. But ever since I jumped onto the RTM build of windows 7 (previously BETA) all my sharing options are grayed out, can't select anything.
I jump into the media streaming options where you're supposed to have a list of devices you can share to but everything is blank and I can't save any changes in there. Then I jump into the homegroup sharing options and "share media with devices" option is also grayed out. I don't know what the heck is going on, if I look at the network map I can clearly see my xbox360 and PC on the same network but I can't get windows to share any media.

What's the deal?

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