I just installed JGNAT on Windows (gnat-gpl-2010-jvm-bin.exe)

This is a sample code hello.adb from the included manual:

with Ada.Text_IO; use Ada.Text_IO;
 procedure Hello is
 begin
    Put_Line ("Hello GNAT for the JVM.");
 end Hello;

First, compile it: jvm-gnatmake hello.adb

jvm-gnatcompile -c hello.adb
jvm-gnatbind -x hello.ali
jvm-gnatlink hello.ali

Looks fine. So let's run it: java hello

Exception in thread "main" java.lang.NoClassDefFoundError: jgnat/adalib/GNAT_libc
    at hello.main(hello.adb)
Caused by: java.lang.ClassNotFoundException: jgnat.adalib.GNAT_libc
    at java.net.URLClassLoader$1.run(Unknown Source)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(Unknown Source)
    at java.lang.ClassLoader.loadClass(Unknown Source)
    at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
    at java.lang.ClassLoader.loadClass(Unknown Source)
    ... 1 more

Any idea why?