Java Application Framework/GUI Editor

Hi,
Having installed Atris 1.0.7, with JDK 1.4.2_03, wrote
MyApplication exemple from tutarial Part 1 (P.12),
compiled ok (using eclipse), but got
java.lang.NoClassDefFoundError: javax/help/HelpSet.

Then installed JavaHelpTM 2.0_02 - October 2004,
recompiled, ran again and got :

javax.help.HelpSetException: Could not parse
Got an IOException (null)
Parsing failed for null

What's going wrong here ? What could you suggest ?

Thanks,
Gil.
gilles.montel@wanadoo.fr