Session State Problem

Hi all,

This is my situation:
I have an index page with 2 links, that send a value through query string:
<a href="login/login.aspx?dsn=ARCMED">ARCMED</a> e
<a href="login/login.aspx?dsn=HPD">HPDD</a>

The querystring value is passed to the login page to define a global variable that will corresponde to the connection string from web.config:

public myConnection As New OracleConnection(ConfigurationSettings.AppSettings(httpcontext.Current.Request.QueryString.Get("dsn") + "_" + "DSN"))

and in web.config I have:

<appSettings>
<add key="ARCMED_DSN" value="Password=password1;User ID=user1;Data Source=datasource1;" />
<add key="HPD_DSN" value="Password=password2;User ID=user2;Data Source=datasource2;" />
</appSettings>

and finally, still in login.aspx, I pass the querystring value to a session for future use in connection string definition when ever I need it:

session("dsn")=httpcontext.Current.Request.QueryString.Get("dsn")

The problem is that after I login... that goes well, I'm transfered to another page. In that page, when I click on any button that calls popups, that need the value stored in the session("dsn") to make the connection to an oracle db, I get this error:

Server Error in '/login' Application.
Session state can only be used when enableSessionState is set to true, either in a configuration file or in the Page directive

I've tried already to set enableSessionState=true in all the popup pages that give me this error, and even in web.config as well.

I've seen in forums:
You are trying to use a session or use a session's properties in a class and ASP.NET cannot get a reference to a session object

Resolution :
Use System.Web.HttpContext.Current.Session to refer to the session instance for the current http request instead of the Session Keyword . System.Web.HttpContext.Current.Session provides you with the System.Web.HttpSessionState instance for the current HTTP request.

Tried that too.

I can't understand what I'm doing wrong.

Is there another way to achive this?


Thanks in advanced
Mário Ramos