Windows 7 Create Network Bridge?

i normal run windows xp on my machine but currently trying out windows 7 but i have a small problem. ok so in xp i create a network bridge with my wireless card and ethernet so that i can connect my xbox 360 to the internet without buying the wireless adapter. now when i try to do this in windows 7 i get an error that says. To create a Network Bridge, you must select atleat two LAN or High-Speed Internet connections that are not being used by Internet Connection Sharing. im useing a lan connection and a high speed wireless connection isnt that all i need....and if it's because of intnert connection sharing how do i turn that off in windows