XSL 1.1 -> Asking for an attribut namespace

Hello List,

I've a XML:
<?xml version="1.0" encoding="ISO-8859-1" standalone="yes"  ?>
<Spalten xmlns:fo="http://www.w3.org/1999/XSL/Format">
    <Datenursprung>//SVERLAUF</Datenursprung>
    <Spalte anzahl="1" breite-in-prozent="3" text-align="right">
        <Titel fix="true"></Titel>
        <Data fix="true" fo:text-align="right">position()</Data>
    </Spalte>
</Spalten>

The problem I have comes when I try to copy all attributes of the <Data/>
node into my result dataset. I want to copy each attribut as long as it has
a namespace of "fo:".

  <xsl:for-each select="$ListData/Spalten/Spalte[$i]/@*">    
    <xsl:if test="starts-with(name(), 'fo:')">
      <xsl:copy-of select="."/>
    </xsl:if>
  </xsl:for-each>

name() always gives me back the correct name, but without the namespace of
the attribut. I want to filter ther attributes this way since I dont want to
have attributes like "anzahl" in my FO result dataset.

Doeas anybody hase a idea how I can solve my probem?
Thanks & with best regards, Jan