session variables are lost when logged into app first time

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Background
We migrated our Asp.net 1.1 application to Asp.net 2.0 ( just migration )
.. It was working fine in local developer machine and one of our development
testing server.
When we moved to staging server which is also running on windows 2000 server
and we started facing a peculiar issue.
We are able to login successfully every time , however , a click on a link
to move to a a different page on a hyper link.

<asp:HyperLin k id="lnkClick" runat="server" ForeColor="Snow "
Font-Italic="True" Font-Size="Small"
Font-Underline="True " Font-Names="Arial" Target="_self"
Font-Bold="True">her e</asp:HyperLink>
Code behind has the following code
lnkClick.Naviga teUrl = Convert.ToStrin g("Files12/Z_All_allReport s.aspx")
What is the issue ?
When the new page is launched , it ends in null reference exception as the
session variables loaded in the previous page were lost.

Our session state is still inproc .
Is it due to any settings on the web server.
Any information is highly appreciated .

[John Saunders]

"SM" <SM@discussions .microsoft.comw rote in message
news:A2******** *************** ***********@mic rosoft.com...
....

Code behind has the following code
lnkClick.Naviga teUrl = Convert.ToStrin g("Files12/Z_All_allReport s.aspx")

Why do you need Convert.ToStrin g?

>
What is the issue ?
When the new page is launched , it ends in null reference exception as the
session variables loaded in the previous page were lost.

Our session state is still inproc .
Is it due to any settings on the web server.

I don't see any reason for your session state to be lost. Please show us why
you believe that your session state is being lost.

A simple test would be to place a Response.Write( Session["KEY"]) before the
place where you're getting the NullReferenceEx ception. This would show
whether the exception is due to missing session state.

John