Making / resolve "generically" instead of to an index file in Apache + mod_mono

I recently tried deploying my extremely "odd/custom" web application and I'm having some problems.

Basically, in my code at Global.asax I have

if(context.Request.Url.AbsolutePath=="/"){ //doesn't work(yields 404 error for index.aspx)
  Response.Write("foo);
}
if(context.Request.Url.AbsolutePath=="/test"){ //does work
  Response.Write("bar");
}

At the moment, I am just using the simple auto configuration for Apache and mod_mono. The only thing I added was making it use .Net 2.0 and I added

ForceType application/x-asp-net

How can I make it so that it won't try to resolve / to some index file, and instead let it be handled by the application?

Note: This works perfectly using xsp alone in my debugging environment