clarification regarding xslt in java

Hi -
  I am trying to do this basic rudimentary XSL transformation using
Java.

input.xml:
-------------
<?xml version="1.0" encoding="UTF-8"?>
<GrandParent>
    <Parent>
        <Son>ABC</Son>
        <Son>EFG</Son>
    </Parent>
</GrandParent>

output_expected.xml:
-------------------------------
<?xml version="1.0" encoding="UTF-8"?>
<Me>
    <Child>
        <Grandson>ABC</Grandson>
        <Grandson>EFG</Grandson>
    </Child>
</Me>

output_actual.xml:
------------------------
<?xml version="1.0" encoding="UTF-8"?>
<Me>
    <Child>
        <Grandson />
        <Grandson />
    </Child>
</Me>

I have the above mentioned input.xml and want to get
output_expected.xml .
Instead I am getting output_actual.xml (with the children text nodes
of GrandSon missing).

The corresponding xsl I had written is:

xform.xsl:
-------------
<?xml version="1.0" encoding="ISO-8859-1" ?>
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
version="1.0">
    <xsl:template match="/">
        <xsl:for-each select="GrandParent">
            <Me>
                <xsl:for-each select="Parent">
                    <Child>
                        <xsl:for-each select="Son">
                            <Grandson>
                                <xsl:value-of select="Son" />
                            </Grandson>
                        </xsl:for-each>
                    </Child>
                </xsl:for-each>
            </Me>
        </xsl:for-each>
    </xsl:template>
</xsl:stylesheet>

The corresponding Java source file to do the transformation in Java
is:

import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;

import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerConfigurationException;
import javax.xml.transform.TransformerException;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.stream.StreamResult;
import javax.xml.transform.stream.StreamSource;

/**
 * Use the TraX interface to perform a transformation in the simplest
manner possible (3 statements).
 */
public class SimpleTransform {
    public static void main(String[] args) throws TransformerException,
TransformerConfigurationException,
            FileNotFoundException, IOException {

        String inputXml = "input.xml";
        String inputXsl = "xform.xsl";
        String outputXml = "output.xml";

        // Use the static TransformerFactory.newInstance() method to
instantiate
        // a TransformerFactory. The javax.xml.transform.TransformerFactory
        // system property setting determines the actual class to
instantiate --
        // org.apache.xalan.transformer.TransformerImpl.
        TransformerFactory tFactory = TransformerFactory.newInstance();

        // Use the TransformerFactory to instantiate a Transformer that will
work with
        // the stylesheet you specify. This method call also processes the
stylesheet
        // into a compiled Templates object.
        Transformer transformer = tFactory.newTransformer(new
StreamSource(inputXsl));

        // Use the Transformer to apply the associated Templates object to
an XML document
        // (foo.xml) and write the output to a file (foo.out).
        transformer.transform(new StreamSource(inputXml), new
StreamResult(new FileOutputStream(outputXml)));

        System.out.println("************* The result is in " + outputXml +
"*************");
    }
}

I am using Java 5.
Any idea - where I am getting it wrong - Java code / XSLT ?