Saxon: java extension functions

Hello List,

This is a Saxon question:

I'm using Saxon 8.2B and I'm trying to add an extension class, MyClass.

<xsl:stylesheet version="2.0" ...
    xmlns:my="java:MyClass">

and create an instance of it:

<xsl:variable name="myClass" select="my:new($parameter)" />

and then call an instance function:

<xsl:variable name="x" select="my:getX($myClass, $parameter)" />

But, running Saxon with the -TJ options, I get "No Java class MyClass
could be loaded". I've tried every namespace I could think of
("java://MyClass", "MyClass", "java:/usr/share/java/MyClass",
"MyClass.class", etc.) but none of them work. The class is in the
classpath (I even tried compiling and running a little Java program
using it and that worked).

Any ideas what I've done wrong?

Cheers,
Richard