ASX are not actually media files. You can open them up in Notepad and see where the real ASF file is. As long as the file is not on an mms:// server you should be able to copy the link into IE to ...

I know that the asx file is correct, as when I link directly to it from the playlist the video pops up.

There is an interesting quirk to .asx playlists. Windows Media Player will display the individual entry titles as a playlist if you are streaming the clips from a media server or if you’re playing ...