Session state can only be used when enableSessionState is set to true, either in a configuration file or in the Page directive

[Robert Kruschke]

I have a two page ASP.net application. I use session variables. I
set the session variable in the first page and read it in the second.
The problem is that the second page has a datagrid, the first page of
the datagrid works fine but any other page crashes with the following
error.

Session state can only be used when enableSessionState is set to true,
either in a configuration file or in the Page directive

The web.config has the following code in it.
<system.web>
<pages enableSessionState="true" enableViewState="true" />

I have also tried page directives. I have also wrote a test
application on the same data from SQL Server (but only the top 20) and
that works fine.

I am using SQL Server on a Windows 2000 server and the website is on
Windows 2000 Pro development computer.

Any help would be appreciated.