TypeName Format of Custom Control is not correct

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VB

.NET

LightSwitch

Hi!
I am having problems with custom controls in LS.
This code is beging displayed:

Quote:

TypeName Format of Custom Control is not correct

And I am using this tutorial for making this Custom control:
http://blogs.msdn.com/b/lightswitch/archive/2011/04/08/how-do-i-display-a-chart-built-on-aggregated-data-eric-erhardt.aspx[^

My code:

<UserControl
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    mc:Ignorable="d" Width="420" Height="340"
    d:DesignHeight="300" d:DesignWidth="400" 
    xmlns:toolkit="http://schemas.microsoft.com/winfx/2006/xaml/presentation/toolkit">

    <Grid x:Name="LayoutRoot" removed="White">
        <toolkit:Chart x:Name="unitsInStockChart" removed="LightBlue" 
		BorderBrush="Green" BorderThickness="2"                        
                       Title="Situation of products in stock" Grid.Column="0" >
            <toolkit:Chart.Series>
                <toolkit:PieSeries Name="PieSeries1" 
		ItemsSource="{Binding Screen.PCharts}" 
		IsSelectionEnabled="False"                           
              	IndependentValueBinding="{Binding Produto1}" 
		DependentValueBinding="{Binding Quantidade1}" />
            </toolkit:Chart.Series>
        </toolkit:Chart>
    </Grid>
</UserControl>

I am trying to fetch my products and how many of them existing in multiple table and put it in a pie chart!
But I thing the problem is this: I need to bind somehow in a dictonary and put it in the chart! I have tried before but the LightSwitch is a little incomplete for begginers!

Sorry for my horrible English!
Thank you all for your attention!