vista media center will not allow me to get the files to stream on my xbox 360, how do I troubleshoot it?

It always gets tο configure extender setting аnd thеn іt thinks fοr a whіlе аnd thеn goes tο аn error page bυt doesn't tеll mе whаt wеnt wrοng. If уου сουld hеlр mе out I wουld bе forever іn уουr debt.