Imagebutton redirect problem

Jeg får ikke min imagebutton at finde redirect koden...

Min kode:
Protected WithEvents ibSearch As System.Web.UI.WebControls.ImageButton
    Protected WithEvents txtSearch As System.Web.UI.WebControls.TextBox

With ibSearch
            .ImageUrl = Server.MapPath("images/bn_yellow_ok.gif")
            .CssClass = "bn"
            .AlternateText = "Search"
            .ID = "search"
        End With

        AddHandler ibSearch.Click, AddressOf ibSearch_Click

        Dim sSearch As String = Request.QueryString("Search")
        If Not sSearch Is Nothing Then
            txtSearch.Text = sSearch
        End If

....

Sub ibSearch_Click(ByVal sender As System.Object, ByVal e As System.Web.UI.ImageClickEventArgs) Handles ibSearch.Click
        If txtSearch.Text <> "" Then
            Response.Redirect("index.aspx?Manage=Search&search=" & DBFix(txtSearch.Text))
        End If
    End Sub

Hvad laver jeg forkert ?