Opening XML w/ Excel

I am building an XML file that I wish to open with Excel. This file will have all kinds of formatting built into it so that the user simply opens the file and they are ready to go. I am building a test version of this file in Windows on my Desktop, but it will ultimately be built on a UNIX box and E-mailed to one or more users. I have gotten it to open and display correctly in Excel, but I am getting some errors along the way.

Double-clicking on the XML file opens it in Excel, but I also get a pop-up window with the following error:

Code:

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There was a problem sending the command to the program.

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I am using SlickEdit as my editor (it handles everything we do at my office). When I open the XML file to edit the raw XML file, SlickEdit is giving me a bunch of minor errors. The first is:

Code:

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Error processing schema for file 'C:\Users\israejr\Desktop\junk.xml'.
File 'C:\Users\israejr\Desktop\urn:schemas-microsoft-com:office:Spreadsheet' not found

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It then gives me the following in a debugging/output window:

Code:

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File C:\Users\israejr\Desktop\junk.xml
  8 47: Error Unknown element 'ss:Workbook'
  8 47: Error Attribute 'xmlns' is not declared for element 'ss:Workbook'
  8 47: Error Attribute '{http://www.w3.org/2000/xmlns/}ss' is not declared for element 'ss:Workbook'
  8 47: Error Attribute '{http://www.w3.org/2000/xmlns/}o' is not declared for element 'ss:Workbook'
  8 47: Error Attribute '{http://www.w3.org/2000/xmlns/}x' is not declared for element 'ss:Workbook'
  8 47: Error Attribute '{http://www.w3.org/2000/xmlns/}html' is not declared for element 'ss:Workbook'
  10 72: Error Unknown element 'o:DocumentProperties'
  10 72: Error Attribute 'xmlns' is not declared for element 'o:DocumentProperties'
  11 12: Error Unknown element 'o:Title'
  12 13: Error Unknown element 'o:Author'
  13 17: Error Unknown element 'o:LastAuthor'
  14 14: Error Unknown element 'o:Company'
  17 67: Error Unknown element 'ss:ExcelWorkbook'
  17 67: Error Attribute 'xmlns' is not declared for element 'ss:ExcelWorkbook'
  18 20: Error Unknown element 'ss:WindowHeight'
  19 19: Error Unknown element 'ss:WindowWidth'
  20 18: Error Unknown element 'ss:WindowTopX'
  21 18: Error Unknown element 'ss:WindowTopY'
  22 24: Error Unknown element 'ss:ProtectStructure'
  23 22: Error Unknown element 'ss:ProtectWindows'
  26 13: Error Unknown element 'ss:Styles'
  27 40: Error Illegal sequence '--' in comment

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I am new to XML, so I am not sure where I have done wrong. I assume it is in the initial declaration part of the xml file, but I have no clue what it should be.

Code:

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<?xml version="1.0" encoding="UTF-8"?>
<?mso-application progid="Excel.Sheet"?>
<ss:Workbook
        xmlns="urn:schemas-microsoft-com:office:Spreadsheet"
        xmlns:ss="urn:schemas-microsoft-com:office:spreadsheet"
        xmlns:o="urn:schemas-microsoft-com:office:office"
        xmlns:x="urn:schemas-microsoft-com:office:excel"
        xmlns:html="http://www.w3.org/TR/REC-html40">

        <o:DocumentProperties xmlns="urn:schemas-microsoft-com:office:office">
                <o:Title>Sales-Transfer Percentage</o:Title>
                <o:Author>Me</o:Author>
                <o:LastAuthor>Me</o:LastAuthor>
                <o:Company>CompanyName</o:Company>
        </o:DocumentProperties>

        <ss:ExcelWorkbook xmlns="urn:schemas-microsoft-com:office:excel">
                <ss:WindowHeight>9000</ss:WindowHeight>
                <ss:WindowWidth>13000</ss:WindowWidth>
                <ss:WindowTopX>480</ss:WindowTopX>
                <ss:WindowTopY>105</ss:WindowTopY>
                <ss:ProtectStructure>False</ss:ProtectStructure>
                <ss:ProtectWindows>False</ss:ProtectWindows>
        </ss:ExcelWorkbook>

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Please tell me what I am doing wrong so that the XML is "clean". Most importantly, I do not want my users getting any error messages when they open a file.

Thanks