Data Controls :: DataList Pagination Pager Not Working

I have 2 datalist and 2repeater(for datalists pagination)

I used pagination code for datalists

1-datalist1  (that this datalist repeater's Id=rptPager)
2-DDLstore (that this datalist repeater's Id=rptPager2)

<asp:DataList ID="DataList1" runat="server" RepeatColumns="2" RepeatDirection="Horizontal" Visible="false">
<ItemTemplate>
<div id="DDLI1_31">
<asp:HyperLink ID="HyperLink3" runat="server" CssClass="LBP3In" NavigateUrl = '<%#"product.aspx?BehCode="+Eval("Behcode")+"&Id="+Eval("Id") %>' Target="_blank">Continue...</asp:HyperLink>
</div>

[Code] ....

And there is other repeater that bind from database I used this repeater for menubar

<ul>
<asp:UpdatePanel ID="UpdatePanel2" runat="server">
<ContentTemplate>
<asp:Repeater ID="rptMenuE" runat="server" >
<ItemTemplate>

[Code] ....

And I have 2 imagebutton that when I click each of them it make datalist's visibility=TRUE

  protected void Imglastpro_Click(object sender, ImageClickEventArgs e) {
DataList1.Visible = true;
rptPager.Visible = true;
DDLstore.Visible = false;
rptPager2.Visible = false; 
this.GetCustomersPageWise(1);

[Code] ...

And below is my pageload event

if (!IsPostBack) {
if (Request.QueryString["ID"] != null) {
if (Request.QueryString["ListType"] == "Store") {
this.GetCustomersPageWiseStore(1);
DataList1.Visible=false;

[Code] ....

Now Problem:

Here when I click on menubar (that I used repeater for showing Item from database)

It bind datalist1 with pagination I mean it bind datalist1 and show pages.

but when I click on Imgstore Button (this button does  DDLstore.Visible = true; DataList1.Visible = false; )

It bind ddlstore and show data but it doesn't show pagination for this datalist I mean it doesn't show rptpager2