With the introduction of Adobe's new .F4v flash wrapper you may find that your server does not respond well to files of the .f4v extension. Mine has been returning a 404 error, despite the file being in the right location.

This appears to be a Mime type error, rather than any coding error. Your server simply does not know what type of file the .f4v is, so we need to tell it.

• On the Windows 2003 server, open the Internet Information Services Manager.
• Expand the Local Computer Server.
• Right-click the local computer server and select Properties.
• Select the MIME Types tab.
• Click New and enter the following information:
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    ColdFISH is developed by Jason Delmore. Source code and license information available at coldfish.riaforge.org
  Associated Extension box: .F4V
  MIME Type box: video/mp4 1Associated Extension box: .F4V
  2MIME Type box: video/mp4
  

• Click OK

You must then restart the World Wide Web Publishing service, as changes do not take effect until the service is refreshed. At this point you should have working .f4v flash movies.