Peter,

That's easy. I'm not calling Session[] from Application_Start before it was
created for sure. :) The code I wrote about is located inside protected void
Application_Error(Object sender, EventArgs e) and it was working for several
years with .NET 1.1. After I switched to 2.0 the same code stopped working.
Although the code is compilable it returns a run-time error when I try to
get this:

try
{
//session = (DxSession)Context.Session["Session"];
//session = (DxSession)HttpContext.Current.Session["Session"];
session = (DxSession)Session["Session"];
}
catch
{
return;
}

I also tried these two calls with the same result. I saw these advices on
the Internet.
session = (DxSession)Context.Session["Session"];
session = (DxSession)HttpContext.Current.Session["Session"];

Just D.