[R] problems with JAVA in JGR library on ubuntu 7.04

[Jarek Jasiewicz]

Hi All
I installed JGR library both on ubuntu 7.10 and 7.04
on 7.10 all went fine,
but on 7.04 I recived massage:

Exception in thread "main" java.lang.NoClassDefFoundError: 
org/rosuda/JRI/RMainLoopCallbacks
        at java.lang.ClassLoader.defineClass1(Native Method)
        at java.lang.ClassLoader.defineClass(ClassLoader.java:620)
        at 
java.security.SecureClassLoader.defineClass(SecureClassLoader.java:124)
        at java.net.URLClassLoader.defineClass(URLClassLoader.java:260)
        at java.net.URLClassLoader.access$100(URLClassLoader.java:56)
        at java.net.URLClassLoader$1.run(URLClassLoader.java:195)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
        at RJavaClassLoader.findClass(RJavaClassLoader.java:137)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:251)
        at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:319)
        at java.lang.Class.getDeclaredMethods0(Native Method)
        at java.lang.Class.privateGetDeclaredMethods(Class.java:2395)
        at java.lang.Class.getMethod0(Class.java:2642)
        at java.lang.Class.getMethod(Class.java:1579)
        at RJavaClassLoader.bootClass(RJavaClassLoader.java:289)
        at RJavaClassLoader.main(RJavaClassLoader.java:326)

All Java have been installed and confgiured following description on:
http://rosuda.org/JGR/linux.shtml

any ideas?
Jarek