HTTP Error 500.19 – Internal Server Error Absolute physical path “C:\inetpub\vhosts\f24u.com\httpdocs\myError404.htm” is not allowed in system.webServer/httpErrors section in web.config file. Use relative path instead.
if you got the above error,
you need to deleted every thing between <httpErrors> </httpErrors>
and add this
<httpErrors>
<remove statusCode=”403″ subStatusCode=”-1″ />
<error statusCode=”403″ prefixLanguageFilePath=”” path=”redir.htm” responseMode=”File” />
</httpErrors>
References
http://webbosworld.co.uk/blog/?p=118