loosing session variable on popup

[Tracey]

I am loosing the data stored in the session variable when I try to open the popup from the hyperlink. Below is my code\[code\] <asp:HyperLink ID="HyperLink1" runat="server" Target="_blank" NavigateUrl='<%#"~/Viewer/DetailsViewer.aspx?ID=" + Eval("Id") + "&QueryID=" + Request.QueryString["QueryID"]%>' Text="View" />\[/code\]The session vraibale in code behind gets cleard out in IE, the version that I am using is 8Any help will be appreciated.