Page.PreviousPage.FindControl

I have 2 web pages. First page has a textbox and a button control.

when I enter test and click on the button , system goes to the second page. And in the second page I want to access the Textbox in the first page. When I try to do this I get the following error.

"Object reference not set to an instance of an object.  Following is my code :

Dim txt As New TextBox

' Find the server name on the previous page
txt = CType(Page.PreviousPage.FindControl("TextBox2"), TextBox)
If Not IsNothing(txt) Then
     Response.Write(Server.HtmlEncode(txt.Text))
Else
     Response.Write("[Name Not available]")
End If

 

I know I could do this with session, but I want to use the Page.PreviousPage.FindControl. Any help is greatly appreciated.
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