xaml - Why LongListSelector ItemTemplate Doesn't Show Anything? -

i need pivot page in every pivot page there longlistselector list data...

this code write when create simple pivot page

<phone:pivotitem header="all">             <phone:longlistselector name="allnotes"                                     background="black"                                     margin="0,0,0,0">                 <phone:longlistselector.itemtemplate>                     <datatemplate>                         <stackpanel background="white"                                     margin="0,17,0,0">                             <textblock text="aaaa">                              </textblock>                         </stackpanel>                     </datatemplate>                 </phone:longlistselector.itemtemplate>             </phone:longlistselector>         </phone:pivotitem> 

but there isn't in pivot item

i mean defining data template , stackpanel, there nothing shown in pivot item

can me ti figure out whats happening exactly?

here binding code

<phone:pivot title="my notepad"                  background="darkcyan">         <!-- notes -->         <phone:pivotitem header="all">             <phone:longlistselector name="firstlistbox"                                     itemssource="{binding allnotes}"                                     background="black"                                     margin="0,0,0,0">                 <phone:longlistselector.itemtemplate>                     <datatemplate>                         <stackpanel margin="0,17,0,0">                             <textblock text="{binding title}"                                        textwrapping="wrap"/>                             <textblock text="{binding memory}"                                        textwrapping="wrap"/>                         </stackpanel>                     </datatemplate>                 </phone:longlistselector.itemtemplate>             </phone:longlistselector>         </phone:pivotitem> 

now think it?