Windows Media Player cannot play this file because the associated Windows Media metafile playlist is not valid.
A metafile is a file that contains information about other files. A Windows Media metafile playlist, a file with an .asx, .wax, .wmx, or .wvx extension, can be used to instruct the Player to play a group of digital media files in a specific order. Metafiles are usually created by a content provider, such as an Internet radio station.
If you created the metafile, verify that it contains items. For information about creating valid Windows Media metafiles, see the Windows Media Player Software Development Kit (SDK) at the Microsoft Web site.