Javahelp 2.04 does not work with java 1.4 #2

When using javahelp 2.04 (more specifically jh.jar included in
http://download.java.net/javadesktop/javahelp/javahelp2_0_04.zip) in java 1.4

I get the following exception:
java.lang.UnsupportedClassVersionError: javax/help/HelpSet (Unsupported
major.minor version 49.0)
at java.lang.ClassLoader.defineClass0(Native Method)
at java.lang.ClassLoader.defineClass(Unknown Source)
at java.security.SecureClassLoader.defineClass(Unknown Source)
at java.net.URLClassLoader.defineClass(Unknown Source)
at java.net.URLClassLoader.access$100(Unknown Source)
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClassInternal(Unknown Source)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Unknown Source)
...

Everything works fine when I use javahelp 2.02.

My java version is java version "1.4.2_05"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.2_05-b04)
Java HotSpot(TM) Client VM (build 1.4.2_05-b04, mixed mode)
on knoppix 3.6

Please provide a build that can be used with java 1.4

Environment

Operating System: All
Platform: All

Affected Versions

[current]