ClassCastException with TransformerFactory

[Keith Thompson]

I am using jdk1.3.1 with Tomcat4.1

This code:
TransformerFactory tf = TransformerFactory.newInstance();

gives me an exception of
java.lang.ClassCastException: org.apache.xerces.jaxp.SAXParserFactoryImpl

I have tried everything I can think of!

These are the things I have tried:
1. I got the "jaxp-api.jar" file from the java web services developer pack 3.1 and placed it here:
c:\tomcat4.1\common\lib

2. I placed a file called "jaxp.properties" here:
c:\jdk1.3.1\jre\lib
with this one line:
javax.xml.transform.TransformerFactory=org.apache.xerces.jaxp.SAXParserFactoryImpl

3. I also tried placing the "jaxp-api.jar" file here:
c:\jdk1.3.1\jre\lib

What should I do?

thanks!
Keith

My whole code snippet is this ==>

DOMSource xml = new DOMSource(document);
Source    xsl = new StreamSource(xslStream);
Result result = new StreamResult(output);
TransformerFactory  tf = TransformerFactory.newInstance();
Transformer    stylesheet  = tf.newTransformer( xsl );
stylesheet.transform( xml, result );