Connecting my Xbox360 to my P.C Home network?

Well my question is mostly about Xbox360 and my Setup.. here goes. My Xbox is connected straight to my router (Netgear DG834 V2)using an ethernet cable as usual, router is connected to phone line and computer. I have both WMP11 and Zune software installed, Media sharing is enabled on both if needed. Right heres the thing, my Vista Basic can see the Xbox360 but when i try to select a computer from my Xbox Dashboard it says no computers connected. There must be a simple answer to this that I am missing. Help would be appreciated..
Also i can connect to Xbox Live no problems .. thats no doubt, I just want to stream my Music, Photos and such. Thanks again! =)
I've enabled Media Sharing on both Zune and WMP11. All successfull but im wondering if it's the network .. it looks like my Xbox360 is connected and is displayed on it, But recomendations would be fab!

u have to share the connection and to stream u music pics e.t.c u can do it through windows media 11 gl