Current home setup is wireless N network with Windows 7 desktop direct connected to router and wireless N adapters for my Windows 7 laptop and XBOX 360. Had previous problem with corrupted file in my music library on desktop so deleted everything, created new library pointing to one folder and reloaded my music tracks.
Problem now is when I start Media Center on my XBOX 360 and go to music library and select my desktop under shared get the following message: There are no items in this library yet - Windows Media Center is searching for media files in the background. To add more music, you can go to Tasks>Settings>Media Libraries.
Actually tried that with no joy. Went back to desktop, uninstalled extender and reinstalled. Again no joy. Here is the interesting part. When I navigate my XBOX 360 dashboard to Video Library in MY Xbox, the music shows up from my dektop, and I can play it. Means to me that I do not have a firewall or permissions issue. Also I can access music thru Media Center from my laptop.