cannot run tomcat4

[canbaby <canbaby@21cn.com>]

Hello:
   I instal the tomcat4 with apt-get, but run it with error log:
==============================
Using CATALINA_BASE:   /var/lib/tomcat4
Using CATALINA_HOME:   /usr/share/tomcat4
Using CATALINA_TMPDIR: /var/lib/tomcat4/temp
Using JAVA_HOME:       /usr/lib/kaffe
Using Security Manager
Internal error: caught an unexpected exception.
Please check your CLASSPATH and your installation.
java/lang/ExceptionInInitializerError
   at java.lang.ClassLoader.getSystemClassLoader(ClassLoader.java:772)
==================================
   Oh, my system is lastest upgraded sarge.
   What's wrong is it? Please help me.
  
   --canbaby--