Is there a way for a WPF page to keep its style when in a Frame?

I have a WPF page that I've styled like this:

Attachment 96103

When I set the source to the WPF page, it looks like it loads. However, the hatched background style disappears.

Attachment 96105

The button is just a test on the main Window. The background remains from the Window and the Page background isn't inherited.

Frame Code:

Code:

---

<Frame Source="{Binding ProductFrameSource}" Name="frameProducts" VerticalAlignment="Stretch" HorizontalAlignment="Stretch" Grid.Column="0" Grid.RowSpan="2" />

---

Code:

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private Uri _ProductFrameSource = new Uri("pack://application:,,,/<omitted>.<omitted>.UI;component/Views/Products/<omitted>/Products_<omitted>.xaml");
        /// <summary>
        /// Gets or sets a property indicating the current product page to display
        /// </summary>
        public Uri ProductFrameSource
        {
            get { return _ProductFrameSource; }
            set
            {
                _ProductFrameSource = value;
                RaisePropertyChanged("ProductFrameSource");
            }
        }

---

Page Style:

Code:

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<Style TargetType="{x:Type Page}">
        <Setter Property="Background">
            <Setter.Value>
                <DrawingBrush TileMode="Tile" Viewport="0 0 40 40" ViewportUnits="Absolute" Viewbox="0 0 100 100" ViewboxUnits="Absolute">
                    <DrawingBrush.Drawing>
                        <DrawingGroup>
                            <GeometryDrawing Brush="#FF1C1C1C" Geometry="M 0 0 L 100 0 L 100 100 L 0 100 Z" />
                            <GeometryDrawing Geometry="M  -10 77.5 L 22.5  110
                                              M  -10 52.5 L 47.5  110
                                              M  -10 27.5 L 72.5  110
                                              M  -10  2.5 L 97.5  110
                                              M  2.5  -10 L  110 97.5
                                              M 27.5  -10 L  110 72.5
                                              M 52.5  -10 L  110 47.5
                                              M 77.5  -10 L  110 22.5">
                                <GeometryDrawing.Pen>
                                    <Pen Brush="#FF908B91" Thickness=".5" />
                                </GeometryDrawing.Pen>
                            </GeometryDrawing>
                        </DrawingGroup>
                    </DrawingBrush.Drawing>
                </DrawingBrush>
            </Setter.Value>
        </Setter>
    </Style>

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Any ideas?