Same User control use for multiple times in a page is not working properly

<asp:Panel ID="pnlResultSet" runat="server">
        <asp:UpdatePanel ID="uplrepeter" runat="server" UpdateMode="Always">
            <ContentTemplate>
                <uc1:PostBackPager ID="PostBackPager2" runat="server" OnNextPageChanged="NextChanged"
                                            OnPreviousPageChanged="PreviousChanged" OnPageChanged="PageChanged" />
                <%--Some Code will be here--%>
                <%--The control "PostBackPager" is for paging for the above portion.
                Now When I click on Page 2 of the usercontrol PostBackPager1
                it changes to page 2 but PostBackPager2 remains its initial state
                and the same is happening for vice versa.--%>
                <uc1:PostBackPager ID="PostBackPager1" runat="server" OnNextPageChanged="NextChanged"
                                            OnPreviousPageChanged="PreviousChanged" OnPageChanged="PageChanged" />
            </ContentTemplate>
        </asp:UpdatePanel>
    </asp:Panel>