R help - Feb 2009 - JRI problem with NoClassDefFoundError

I tried to run rtest.java (example Java file found together with JRI
library). But I got the following error.
I run it with NetBeans on Windows XP.

run:
java.lang.NoClassDefFoundError: Files\R\R-2/8/1\library\rJava\jri
Caused by: java.lang.ClassNotFoundException:
Files\R\R-2.8.1\library\rJava\jri
        at java.net.URLClassLoader$1.run(URLClassLoader.java:200)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
        at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:252)
        at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:320)
Could not find the main class: Files\R\R-2.8.1\library\rJava\jri.  Program
will exit.
Exception in thread "main"
Exception in thread "main" Java Result: 1
BUILD SUCCESSFUL (total time: 0 seconds)

Can anyone help please? Thanks.
-- 
Yakub

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