problems running checkstyle from ant

Hello everyone,

I'm having troubles running checkstyle 4.3 from an ant task - I've
followed the description on the checkstyle website, but it fails with
java.lang.NoClassDefFoundError: org/apache/commons/beanutils/Converter
exception.

The confusing thing is the classpath printed just before the checkstyle
task is correct, i.e. it contains all the jar files from
checkstyle-4.3/lib, the files exist etc. The whole target is defined like
this:
------------------------------------------------------------------------

    <!-- CheckStyle -->
    <property name="checkstyle.home"    
value="external_resources/checkstyle" />
    <property name="checkstyle.ant"     
value="${checkstyle.home}/checkstyle-4.3.jar" />
    <property name="checkstyle.config"  
value="${checkstyle.home}/sun_checks.xml" />
    <property name="checkstyle.output"  
value="test/output/checkstyle.xml" />

    <path id="checkstyle.classpath">
      <fileset dir="${checkstyle.home}">
          <include name="*.jar" />
        </fileset>
    </path>

    <!-- checkstyle -->
    <taskdef resource="checkstyletask.properties"
classpath="${checkstyle.ant}" />
    <target name="checkstyle">

      <property name="myclasspath" refid="checkstyle.classpath" />
      <echo message="${myclasspath}" />

      <checkstyle config="${checkstyle.config}"
classpathref="checkstyle.classpath">

            <classpath refid="checkstyle.classpath" />

            <!-- what to check -->
            <fileset dir="${tdstool.src.home}">
                <include name="**/*.java"/>
            </fileset>

        </checkstyle>

    </target>

------------------------------------------------------------------------

Heve you seen such error - maybe it's something trivial or so, but I've
been debugging this for about two hours without luck.

Thanks for help
Tomas


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