Use Server.Transefet instead of Response.redirect, so you can use previous page values.
Example :- using previous page value as
Dim txt As TextBox
txt = CType(Page.PreviousPage.FindControl _
("serverNameText"), TextBox)
If Not IsNothing(txt) Then
prevServerName.Text = Server.HtmlEncode(txt.Text)
Else
prevServerName.Text = "[Name Not available]"
End If