ANT - Checkstyle with custom check

I started using checkstyle with ant about a week ago. It went smooth.
Trying to add custom checks is kicking my butt.

I have a check TabOnlyForIndent extends Check
in package org.hopto.defcon1.checks;
I packaged as a jar from eclipse, it has an empty manifest (besides version).

in ant i load checkstyle and put my jar in the classpath:
<taskdef resource="checkstyletask.properties">
	<classpath>
		<pathelement location="lib/checkstyle-5.0-beta01/checkstyle-all-5.0-beta01.jar"/>
		<pathelement location="lib/Defcon1Checks.jar"/>
	</classpath>
</taskdef>

I add my check to the config

 <!-- <module name="TabCharacter"/> Viva La \t -->
 <module name="org.hopto.defcon1.checks.TabOnlyForIndent"/>
 <module name="WhitespaceAfter"/>

Have my checkstyle target in ant

<target name="checkstyle" depends="compile"
 description="Checks that we are using consistant well formed style.">
	<checkstyle config="config_checkstyle.xml" failOnViolation="false">
		<fileset dir="src" includes="**/*.java"/>
		<formatter type="xml" toFile="checkstyle-result.xml"/>
	</checkstyle>
</target>

And kaboom:
Unable to create a Checker: cannot initialize module TreeWalker -
Unable to instantiate org.hopto.defcon1.checks.TabOnlyForIndent

I've tried compiling my check under java 6 and specifying target 1.4
Tryed various ways of including in classpath

Ideas, Thoughts, Recommendations?

Thomas Suckow

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