Exception in thread "AWT-EventQueue-0" java.lang.N

[bisana]

Hi
I am trying to setup jZMConsole latest version
I have Java 1.5 environment on CetnOS
"java -version " shows
java version "1.5.0_07"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.5.0_07-b03)
Java HotSpot(TM) Client VM (build 1.5.0_07-b03, mixed mode, sharing)

When I run "java -jar jZMConsole.jar"
I get this error
Exception in thread "AWT-EventQueue-0" java.lang.NoClassDefFoundError: javax/swing/GroupLayout$Group
at net.securitykit.jzmconsole.ZMConsole.<init>(ZMConsole.java:75)
at net.securitykit.jzmconsole.ZMConsole.init(ZMConsole.java:824)
....
Guidance requested
Thanks
Joseph John