Did you install Office to that machine with IE7 too? Without Office, IE 
(behind the scenes MSXML3) renders the xml not Excel.

Regards,
- Umut Alev [MSFT]

"Ken Cooper" <kenajcooper@a...> wrote in message 
news:1167812962.931926.82010@k......
> Hi All
>
> I have a database that generates xml pages and send them to the browser
>
> The xml pages are basically excel based pages and need to display as
> such
>
> In IE7 they display as spreadsheets but in IE6 they display as text
> only
>
> the Header of my xml files are as follows:
> -----------------------------------------------------------------------------------------------------------
> <?xml version="1.0"?>
> <?mso-application progid="Excel.Sheet"?>
> <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">
> <DocumentProperties xmlns="urn:schemas-microsoft-com:office:office">
>  <LastAuthor>KEN</LastAuthor>
>  <LastPrinted>02/01/2007</LastPrinted>
>  <Created>2006-12-12T15:08:18Z</Created>
>  <Version>11.8107</Version>
> </DocumentProperties>
> <ExcelWorkbook xmlns="urn:schemas-microsoft-com:office:excel">
>  <WindowHeight>7935</WindowHeight>
>  <WindowWidth>14715</WindowWidth>
>  <WindowTopX>480</WindowTopX>
>  <WindowTopY>555</WindowTopY>
>  <ProtectStructure>False</ProtectStructure>
>  <ProtectWindows>False</ProtectWindows>
> </ExcelWorkbook>
> etc etc etc
>
> -----------------------------------------------------------------------------------------------------------
>
> Am I missing something
>
> Thanks in advance
>
> best Regards
>
> Ken Cooper
>