How Can I Add Third Pivot Item

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windows-phone

I am trying this code from the given link[^]
but I am not able to add third pivot.
Need help?
also when i add a new pivot page the default code is

<phone:PivotItem Header="Item1" >

but given code in link is this

<controls:PivotItem Header="item1">

My page displays this code on adding a pivot page. and i cannot add a third pivot need help???

<!--LayoutRoot is the root grid where all page content is placed-->
    <Grid x:Name="LayoutRoot" Background="Transparent">
        <!--Pivot Control-->
        <phone:Pivot Title="MY APPLICATION">
            <!--Pivot item one-->
            <phone:PivotItem Header="Item1" >

            </phone:PivotItem>
        </grid>
            <!--Pivot item two-->
            <phone:PivotItem Header="Item2" >

            </phone:PivotItem>
        </phone:Pivot>

 </Grid>
 </phone:PhoneApplicationPage>