How To Share Session Between Page In Page To Page Request

My application is simple, I have 2 pages:

RSSProducer.aspx: A page that generates RSS (XML) feeds
RssConsumer.aspx: A page that retrieves the RSS feeds and displays it to the user in a repeater control. To do this I am using the System.Xml.XmlTextReader to fill a DataSet with tables based on the RSS-XML retrieved from the RSSProducePage. A table within the DataSet is bound to the repeater control.

For example, this is what I have in my RssConsumer.aspx page:

Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
Session("permittedToViewSomeDetail") = True
Dim url = "http://localhost/DevSite/RSSProducer.aspx"
Dim reader As New System.Xml.XmlTextReader(url)
Dim ds As New DataSet()
ds.ReadXml(reader)
myRssRepeater.DataSource = ds.Tables(2)
myRssRepeater.DataBind()
End Sub

My problem is that user-authorization details are stored in Session in the RssConsumer page that need to be accessed in the RSSProducer page (in this example it would be Session("permittedToViewSomeDetail") that I need to access in the RSSProducer page); however, the Session identifier is not common between the two. This means that I cannot access the authorization details in the RSSProducer page.

The reason for why is fairly clear to me:

User's browser makes a request to the RssConsumer page Server generates a Session ID (which is stored in a cookie) if there is no existing Session Identifer The RSSConsumer requests the RSSProducer page...which generates a new Session ID every time because no session identifier is ever going to be found.

I tried using cookieless session so that I could pass the SessionID via the URL to the RSSProducer page as an experiment but for some reason the XmlTextReader doesn't work well with this method (but the desired shared session does work). I've hit a brick wall here. Does anyone know how to share session between pages when one page makes a request to the other?