[2005] web.config 404 redirects

Hi there,

I am trying to use 404 redirects on my site. I added this line to the web.config.

<customErrors mode="RemoteOnly" defaultRedirect="GenericErrorPage.htm"/>

I also tried this...
<customErrors mode="On" defaultRedirect="GenericErrorPage.htm"/>

I tested it with .html and .aspx pages... It's works fine with .aspx and fails with .html

I searched on line but failed to find any info? Maybe I just didn't do the right search.

any ideas? I has to be simple.

Thanks

Is your virtual directory configured to handle .html files using the ISAPI DLL for ASP.NET?