Page Not Found error when uploading large files on Win2003
Sometimes the upload of large files on a Windows 2003 server does not succeed even though the
maxRequestLength configuration property is set to a very large value. The browser displays "Page Not Found" error.
The reason for the problem could be a setting in the IIS 6.0 MetaBase.XML file (located at the
%systemroot%\system32\inetsrv directory). The property to look for is
AspMaxRequestEntityAllowed, which specifies the maximum number of bytes allowed in the entity body of an ASP request. If a
Content-Length header is present and specifies an amount of data greater than the value of
AspMaxRequestEntityAllowed, IIS returns a 403 error response. This property is related in function to
MaxRequestEntityAllowed, but is specific to ASP request. Whereas you might set the
MaxRequestEntityAllowed property to 1 MB at the general World Wide Web Publishing Service (WWW Service) level, you may choose to set
AspMaxRequestEntityAllowed to a lower value, if you know that your specific ASP applications handle a smaller amount of data. In your case you should increase this value - for example to 200000000 (~200MB).
Open your MetaBase.XML which is located in c:\Windows\System32\Inetsrv find the line
AspMaxRequestEntityAllowed and change it to a larger value. This change does not require stopping IIS, but to make the Metabase.xml file write-able, you need to go to the IIS control panel, right click the server, select properties, and check off the box that says "allow changes to MetaBase configuration while IIS is running".
If your application is located on a shared hosting where you have no access to the MetaBase.XML file, you should contact your hosting company for assistance.