Can someone offer a clue as to why this grid won't display "Horizontal" lines.  Its not hooked up to a skin.  This is Infragistics 8.1

<igtbl:UltraWebGrid ID="uwgTxnGrid" runat="server" EnableCrawlerDetection="False"
                Width="100%" Height="406px" OnInitializeRow="uwgTxnGrid_InitializeRow" OnDblClick="uwgTxnGrid_DblClick">
                <Bands>
                    <igtbl:UltraGridBand CellClickAction="RowSelect" RowSelectors="No">
                        <Columns>
                            <igtbl:UltraGridColumn Key="Status">
                            </igtbl:UltraGridColumn>
                        </Columns>
                        <AddNewRow View="NotSet" Visible="NotSet">
                        </AddNewRow>
                    </igtbl:UltraGridBand>
                </Bands>
                <DisplayLayout AllowColSizingDefault="Free"
                    AllowSortingDefault="OnClient" BorderCollapseDefault="Separate" Name="ctl00xUltraWebGrid1"
                    RowHeightDefault="20px" StationaryMargins="Header"
                    StationaryMarginsOutlookGroupBy="True" TableLayout="Fixed" Version="4.00"
                    ColWidthDefault=""
                    GridLinesDefault="Horizontal" SelectTypeRowDefault="Extended">
                    <FrameStyle BackColor="Window" BorderColor="InactiveCaption"
                        Font-Names="Microsoft Sans Serif" Font-Size="8.25pt" Height="406px"
                        HorizontalAlign="Left" Width="100%" Wrap="True" VerticalAlign="Top">
                    </FrameStyle>
                    <ClientSideEvents DblClickHandler="uwgTxnGrid_DblClickHandler"  />
                    <Pager MinimumPagesForDisplay="2">
                        <PagerStyle>
                            <BorderDetails WidthLeft="1px" WidthTop="1px" />
                        </PagerStyle>
                    </Pager>
                    <FooterStyleDefault BackColor="LightGray" BorderStyle="Solid" BorderWidth="1px">
                        <BorderDetails ColorLeft="White" ColorTop="White" WidthLeft="1px" WidthTop="1px" />
                    </FooterStyleDefault>
                    <HeaderStyleDefault BackColor="#F5F9F9" HorizontalAlign="Left"
                        BorderColor="Black" BorderWidth="1px">
                        <BorderDetails WidthLeft="1px" WidthTop="1px" />
                    </HeaderStyleDefault>
                    <RowStyleDefault BackColor="Window" BorderColor="Silver"
                        Font-Names="Microsoft Sans Serif" Font-Size="8.25pt">
                        <BorderDetails ColorLeft="Window" ColorTop="Window" />
                    </RowStyleDefault>
                    <GroupByRowStyleDefault BackColor="Control" BorderColor="Window">
                    </GroupByRowStyleDefault>
                    <SelectedRowStyleDefault BackColor="#F8E19B">
                    </SelectedRowStyleDefault>
                    <GroupByBox Hidden="True">
                        <BoxStyle BackColor="ActiveBorder" BorderColor="Window">
                        </BoxStyle>
                    </GroupByBox>
                    <AddNewBox>
                        <BoxStyle BackColor="Window" BorderColor="InactiveCaption">
                            <BorderDetails WidthLeft="1px" WidthTop="1px" />
                        </BoxStyle>
                    </AddNewBox>
                    <ActivationObject BorderColor="" BorderWidth="">
                    </ActivationObject>
                    <FilterOptionsDefault AllowRowFiltering="OnClient" FilterIcon="True" FilterRowView="Top"
                        FilterUIType="FilterRow">
                        <FilterDropDownStyle BackColor="#FFFFF1" BorderColor="Black" BorderStyle="Solid"
                            BorderWidth="1px" CustomRules="overflow:auto;" Font-Names="Microsoft Sans Serif"
                            Font-Size="8.25pt" Height="300px" Width="200px">
                            <Padding Left="2px" />
                        </FilterDropDownStyle>
                        <FilterHighlightRowStyle ForeColor="#FFFFF1">
                        </FilterHighlightRowStyle>
                        <FilterRowStyle BackColor="#FFFFF1">
                        </FilterRowStyle>
                        <FilterOperandDropDownStyle BackColor="White" BorderColor="Silver" BorderStyle="Solid"
                            BorderWidth="1px" CustomRules="overflow:auto;" Font-Names="Verdana,Arial,Helvetica,sans-serif"
                            Font-Size="11px">
                            <Padding Left="2px" />
                        </FilterOperandDropDownStyle>
                    </FilterOptionsDefault>
                </DisplayLayout>
            </igtbl:UltraWebGrid>