Created Issue: "The parameter is incorrect" is thrown when adding more than 5 ListPickerItem in xaml [10838]

When adding more than 5 ListPickerItem in xaml, it throws exceptions "The parameter is incorrect."
<toolkit:ListPicker HorizontalAlignment="Left" Name="listPicker1" VerticalAlignment="Top" Width="271" >
<toolkit:ListPickerItem Content="1" />
<toolkit:ListPickerItem Content="2" />
<toolkit:ListPickerItem Content="3" />
<toolkit:ListPickerItem Content="4" />
<toolkit:ListPickerItem Content="5" />
<toolkit:ListPickerItem Content="6" />
</toolkit:ListPicker>