Problem with XLS mapping

I wonder if anyone can help. I am using the following XSLT to change the format of the outgoing file to ISO-8859-1 encoding but the file that is delivered from XI actually ends up looking like this XSLT and not the actual file. Am I missing anything?

<?xml version="1.0" encoding="UTF-8"?>

<xsl:stylesheet version= "1.0"

xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:fo="http://www.w3.org/1999/XSL/Format">

<xsl:output encoding="ISO-8859-1"/>

<xsl:template match="/">

<xsl:copy-of select="*"/>

</xsl:template>

</xsl:stylesheet>

Thanks.