How to get hiddenfield value from previous page to next page in asp.net

Hi all,
I am developing a web application in which i need to store a some values in a hiddenfield and i need to access this values in other pages. I need to post huge data and so i prefer using HiddenField than Session or QueryString. I am using the following code.
 
Default1.aspx
 

 <asp:HiddenField ID="hdnEmailID" runat="server" />

 
Default1.aspx.cs
 

protected void LinkGroupSummary_Click(object sender, EventArgs e)
        {            
            hdnEmailID.Value = this.EmailList;
            Server.Transfer("Default2.aspx");
 
        }

 
Default2.aspx.cs
 

if (Page.PreviousPage != null)
                    {
                        HiddenField MyHiddenValue = (HiddenField)Page.PreviousPage.FindControl("hdnEmailID");
                        if (MyHiddenValue != null)
                        {
                            string email = MyHiddenValue.Value;
                        }
                    }

In the Default.aspx.cs page, i am getting MyHiddenField as null always.
 
Please help.
 
Thanks in advance,
Sruthi R