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Sep 20, 2010 07:28 PM|LINK
I think you will need to go to an actual page rather than a path
<customErrors mode="On" defaultRedirect="/Error/ServerError/500" />
<httpErrors errorMode="Custom" defaultResponseMode="Redirect" defaultPath="~/Error/ServerError">
You have been trying to go to somewhere with and extension. Try something like:
<customErrors mode="On" defaultRedirect="/Error/ServerError/500.aspx" />
If not try going to a basic htm page first and then to aspx pages.