XML Multiple Excel WorkSheets Enhanced Functionality

Question

The code below has been modified from this solution: How to generate excel files with the multiple sheets in VisualForce which does work but I was looking to add extra functionality such as freezing the top row pane, changing tab color, and filtering.....Can anyone point me in the right direction on how I can do this? I don't really know much about XML. I have tried this to freeze the panes but it keeps saying the excel file is corrupt and won't open

<WorksheetOptions xmlns="urn:schemas-microsoft-com:office:excel">
 <Selected/>
   <FreezePanes/>
   <FrozenNoSplit/>
   <SplitHorizontal>1</SplitHorizontal>
   <TopRowBottomPane>1</TopRowBottomPane>
   <SplitVertical>1</SplitVertical>
   <LeftColumnRightPane>1</LeftColumnRightPane>
   <ActiveRow>2</ActiveRow>
   <Panes>
    <Pane>
     <Number>1</Number>
    </Pane>
    <Pane>
     <Number>2</Number>
    </Pane>
   </Panes>
   <ProtectObjects>False</ProtectObjects>
   <ProtectScenarios>False</ProtectScenarios>
  </WorksheetOptions>

Actual Code

<apex:page controller="CustomPBListController" contentType="txt/xml#myTest.xls" cache="true">
 <apex:outputText value="{!xlsHeader}"/>
 <Workbook xmlns="urn:schemas-microsoft-com:office:spreadsheet"
 xmlns:o="urn:schemas-microsoft-com:office:office"
 xmlns:x="urn:schemas-microsoft-com:office:excel"
 xmlns:ss="urn:schemas-microsoft-com:office:spreadsheet"
 xmlns:html="http://www.w3.org/TR/REC-html40">
  <Styles>
  <Style ss:ID="s1">
  <Alignment/>
  <Borders/>
  <Font ss:Bold="1"/>
  <Interior/>
 <NumberFormat/>
<Protection/>
 </Style>
 </Styles>
 <Worksheet ss:Name="Standard Price Book" >
 <Table x:FullColumns="1" x:FullRows="1">
 <Column ss:Width="80"/>
 <Row>
 <Cell ss:StyleID="s1"><Data ss:Type="String" >Standard Price Book</Data>    </Cell>
  </Row>
 <apex:repeat value="{!standard}" var="stpb">
  <Row>
 <Cell><Data ss:Type="String">{!stpb.ProductCode}</Data></Cell>
 </Row>
 </apex:repeat>
 </Table>
 </Worksheet>
 <Worksheet ss:Name="Test Price Book">
 <Table x:FullColumns="1" x:FullRows="1">
 <Column ss:Width="100"/>
 <Column ss:Width="80"/>
  <Column ss:Width="80"/>
 <Row>


<Cell ss:StyleID="s1"><Data ss:Type="String" >Product Code</Data></Cell>
 <Cell ss:StyleID="s1"><Data ss:Type="String" >Unit Price</Data></Cell>
 </Row>
 <apex:repeat value="{!pb3}" var="test">
 <Row>
 <Cell><Data ss:Type="String">{!test.ProductCode}</Data></Cell>
 <Cell><Data ss:Type="String">{!test.UnitPrice}</Data></Cell>
 </Row>
 </apex:repeat>
 </Table>
 </Worksheet>
  <Worksheet ss:Name="Novation Tier - 1">
 <Table x:FullColumns="1" x:FullRows="1">
 <Column ss:Width="100"/>
 <Column ss:Width="80"/>
 <Column ss:Width="80"/>
 <Row>
 <Cell ss:StyleID="s1"><Data ss:Type="String" >Product Code</Data></Cell>
 <Cell ss:StyleID="s1"><Data ss:Type="String" >Unit Price</Data></Cell>
 </Row>
 <apex:repeat value="{!pb4}" var="novation1">
 <Row>
 <Cell><Data ss:Type="String">{!novation1.ProductCode}</Data></Cell>
 <Cell><Data ss:Type="String">{!novation1.UnitPrice}</Data></Cell>
 </Row>
 </apex:repeat>
 </Table>
 </Worksheet>
 <Worksheet ss:Name="MedAssets">
 <Table x:FullColumns="1" x:FullRows="1">
 <Column ss:Width="100"/>
 <Column ss:Width="80"/>
 <Column ss:Width="80"/>
 <Row>
 <Cell ss:StyleID="s1"><Data ss:Type="String" >Product Code</Data></Cell>
 <Cell ss:StyleID="s1"><Data ss:Type="String" >Unit Price</Data></Cell>
 </Row>
 <apex:repeat value="{!pb5}" var="medassets">
 <Row>
 <Cell><Data ss:Type="String">{!medassets.ProductCode}</Data></Cell>
 <Cell><Data ss:Type="String">{!medassets.UnitPrice}</Data></Cell>
 </Row>
 </apex:repeat>
 </Table>
<WorksheetOptions xmlns="urn:schemas-microsoft-com:office:excel">
   <TabColorIndex>51</TabColorIndex>
   <Panes>
    <Pane>
     <Number>3</Number>
     <ActiveRow>27</ActiveRow>
     <ActiveCol>3</ActiveCol>
    </Pane>
   </Panes>
   <ProtectObjects>False</ProtectObjects>
   <ProtectScenarios>False</ProtectScenarios>
  </WorksheetOptions>
 </Worksheet>
</Workbook>
</apex:page>

Update to show Corrupt file error message. I also added the section to the bottom of the apex page that when put into the code it throws the error. Once I take it out, the file is fine.