XLSX requiring password on MOSS 2007 Publishing Site (Public Site)

I have two documents, a .docx and an .xlsx both are in the same folder (Document Library) on the MOSS site and are linked in a content page. The .docx downloads as expected. When you click on th开发者_开发知识库e .xlsx file it prompts for a username/password.

The documents are both "Published" so that wasn't the issue.

Any ideas?

Comment the xlsx extension from file serverfilesExcelServer.xml in location:

C:\Program Files\Common Files\Microsoft Shared\Web Server Extensions\12\TEMPLATE\XML

<ServerFiles>
 <Mapping FileExtension="odc"  RedirectUrlTemplate= "/_layouts/xlviewer.aspx?id=|0" NoGetRedirect="TRUE"/>
 <!--<Mapping FileExtension="xlsx" RedirectUrlTemplate= "/_layouts/xlviewer.aspx?id=|0" NoGetRedirect="TRUE"/>-->
 <Mapping FileExtension="xlsb" RedirectUrlTemplate= "/_layouts/xlviewer.aspx?id=|0" NoGetRedirect="TRUE"/>
</ServerFiles>

solution found here: open email link to xlsx (excel 2007) file in MOSS 2007 document library.