MergedRegions

["Nachtweh Heike" <Nachtweh his de>]

Hello everybody,
 
I am trying to create an Excel spreadsheet from an XML-document by
running it through an XSLT and Apache-Cocoon2 (with the HSSF-Serializer,
which needs the gnumeric spreadsheet file format, version 0.7-1.04).
I would like to use the MergedRegions-tag.
 
In the XSLT I tried this:
...  
<gmr:MergedRegions>
<Merge>C14:H14</Merge>
</gmr:MergedRegions>
...
 
and this:
...
<gmr:MergedRegions>
<gmr:Merge endRow="13" endCol="7" startRow="13" startCol="3"/>
</gmr:MergedRegions>
...
 
But there was no result in the Excel-file. Perhaps the code is wrong? 
Does anyone have any idea?
 
Thanks,
Heike