I am having a problem with a Silverlight RadChart not sizing correctly to the parent container Grid Cell

With the below XAML you can see in the attached images that the chart goes outside the constraints of the grid cell in both Visual Studio and when running in IE9.

Is there an option I have to explicitly set to get the chart to size correctly?

            <Grid x:Name="TotalFaultCustomerGrid" Grid.Row="1">
                <Grid.RowDefinitions>
                    <RowDefinition Height="30"/>
                    <RowDefinition Height="Auto"/>
                </Grid.RowDefinitions>
                
                <TextBlock x:Name="CutomerFaultsTitle" Grid.Row="0" Text="Total Faults By Customer" FontSize="20"
                                Foreground="#FFD8D0D0" Margin="5" VerticalAlignment="Center"
                                HorizontalAlignment="Center" TextAlignment="Center" />   
                
                <telerik:RadChart x:Name="FaultCountByCustomerChart" Grid.Row="1"
                                    ItemsSource="{Binding FaultCountByCustomer}">
                    <telerik:RadChart.SeriesMappings>
                        <telerik:SeriesMapping>
                            <telerik:SeriesMapping.SeriesDefinition>
                                <telerik:BarSeriesDefinition/>
                            </telerik:SeriesMapping.SeriesDefinition>
                            <telerik:ItemMapping FieldName="Business" DataPointMember="XCategory"/>
                            <telerik:ItemMapping FieldName="Faults" DataPointMember="YValue"/>
                        </telerik:SeriesMapping>
                    </telerik:RadChart.SeriesMappings>
                    <telerik:RadChart.DefaultView>
                        <telerik:ChartDefaultView>
                            <telerik:ChartDefaultView.ChartLegend>
                                <telerik:ChartLegend x:Name="ChartLegend1" Visibility="Collapsed"/>
                            </telerik:ChartDefaultView.ChartLegend>
                            <telerik:ChartDefaultView.ChartArea >
                                <telerik:ChartArea Margin="0,0,0,-0.994">
                                    <telerik:ChartArea.AxisY >
                                        <telerik:AxisY StripLinesVisibility="Collapsed"/>
                                    </telerik:ChartArea.AxisY>
                                    <telerik:ChartArea.AxisX>
                                        <telerik:AxisX LabelRotationAngle="80"/>
                                    </telerik:ChartArea.AxisX>
                                </telerik:ChartArea>
                            </telerik:ChartDefaultView.ChartArea>
                        </telerik:ChartDefaultView>
                    </telerik:RadChart.DefaultView>
                </telerik:RadChart>                           
            </Grid>