Translet Extension Error

[Xserty]

Hi!
        I'm new to Xalan, and I'm trying to compile a stylesheet with a 
Java extension.
This stylesheet with Java extension works fine if I transform it using the 
TrAX.
If I try to compile it as a Translet, I get the following error message 
from the getErrors()
vector:
Cannot find external method 'myToString' (must be public).
(It is public and it's in my CLASSPATH)

I've searched through the mailling list archives, but I didn't find an answer!
Hope to hear from you and thanks in advance! ;))
        Xserty
PS: I include, in this email, the involved bits of files for further 
information:

----------------------------------------XSL 
file---------------------------------
<xsl:stylesheet version="1.0"
                xmlns:xsl="http://www.w3.org/1999/XSL/Transform";
                xmlns:xalan="http://xml.apache.org/xalan";
                xmlns:myClass="MyCounter"
                extension-element-prefixes="myClass">
        <xalan:component prefix="myClass" functions="myToString">
                <xalan:script lang="javaclass" src="xalan://MyCounter"/>
        </xalan:component>
        <xsl:template match="/">
                <h1><xsl:value-of select="myClass:myToString()"/></h1>
        </xsl:template>
</xsl:stylesheet>
--------------------------------------------------------------------------------------

--------------------------------JAVA class (MyCounter)------------------
[...]
public class MyCounter {
[...]
  public MyCounter ()
  {}
  public void init (XSLProcessorContext context, ElemExtensionCall extElem)
  { [...] }
  public String myToString() {
    return("This is MyCounter!");
  }
----------------------------------------------------------------------------------------