Shapefile not show in debug, but in perview show

[ALI]

                           

Hi, I can see the map in preview, but not when I debug. Does anyone know why?

 

<telerik:RadMap x:Name="radMap" ZoomLevel="11" Center="35.675,+51.35" >
                         <telerik:RadMap.Provider>
                            <telerik:EmptyProvider />
                        </telerik:RadMap.Provider>
                        <telerik:VisualizationLayer>
                                    <telerik:VisualizationLayer.Reader>
                                <telerik:AsyncShapeFileReader DataSource="/WpfApp5;component/shp9/tt.dbf"
                                            Source="/WpfApp5;component/shp9/tt.shp">
                                </telerik:AsyncShapeFileReader>
                                    </telerik:VisualizationLayer.Reader>
                                </telerik:VisualizationLayer>
</telerik:RadMap>