TransformerException using DOMSource

[Jonathan_Pico]

I get an exception:

      javax.xml.transform.TransformerException: stylesheet requires
attribute: version

when I execute xalan with a DOMSource like so:

public static void main(String[] args){
    DocumentBuilderFactory dfactory = DocumentBuilderFactory.newInstance();
    DocumentBuilder dBuilder = dfactory.newDocumentBuilder();
    Source xsl = new DOMSource(dBuilder.parse(new File(workingDir,
"input.xsl")));
    //Source xsl = new StreamSource(new File(workingDir, "input.xsl"));
    Source input = new DOMSource(dBuilder.parse(new File(workingDir,
"input.xml")));
    StreamResult output = new StreamResult(new File(workingDir,
"output.xml"));
    TransformerFactory tFactory = TransformerFactory.newInstance();
    Transformer transformer = tFactory.newTransformer(xsl);
    transformer.transform(input, output);
}

but when I execute xalan with a StreamSource it works fine.  Here is my
input.xsl file:

<?xml version="1.0"?>
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform";
xmlns:lxslt="http://xml.apache.org/xslt"; xmlns:customMap="CustomSplit"
extension-element-prefixes="customMap" version="1.0">
    <lxslt:component prefix="customMap" elements="customSplit1 customSplit2
customSplit3">
        <lxslt:script lang="javaclass" src
="xalan://org.eclipse.xml.xslt.experiment7.CustomSplit"/>
    </lxslt:component>

    <xsl:template match="/">
        <DstRoot>
            <DstElement1><customMap:customSplit1/></DstElement1>
            <DstElement2><customMap:customSplit2/></DstElement2>
            <DstElement3><customMap:customSplit3/></DstElement3>
        </DstRoot>
    </xsl:template>
</xsl:stylesheet>

Any ideas why this does not work?

I'm using xalan-j_2_3_1on windows NT.