any java expert on 64 bit ?

[Marcel Janssen]

Hi,

I'm trying to run xnap (http://xnap.sourceforge.net) on a FC4test3 system, but 
it ends in :

java -jar xnap.jar
Could not read startup classpath from /root/.xnap/loader (/root/.xnap/loader 
(No such file or directory))
Using default class path
Could not load XNap
java.lang.ClassNotFoundException: org.xnap.XNap not found in 
org.xnap.loader.XNapClassLoader{urls=[file:/forms-1.0.2/forms-1.0.2.jar,file:/jh-1.1.3/jh-1.1.3.jar,file:/gnu.getopt-1.0.9/gnu.getopt-1.0.9.jar,file:/libreadline-java-0.8.0/libreadline-java-0.8.0.jar,file:/log4j-1.2.8/log4j-1.2.8.jar,file:/touchgraph-1.21/touchgraph-1.21.jar,file:/xnap-core-3.0-pre1/xnap-core-3.0-pre1.jar,file:/xnap-core-3.0-pre1/xnap-icons-1.jar,file:/kunststoff-2.0.1/kunststoff-2.0.1.jar], 
parent=gnu.gcj.runtime.SystemClassLoader{urls=[file:xnap.jar,file:./], 
parent=gnu.gcj.runtime.ExtensionClassLoader{urls=[], parent=null}}}
   at java.net.URLClassLoader.findClass(java.lang.String) 
(/usr/lib64/libgcj.so.6.0.0)
   at java.lang.ClassLoader.loadClass(java.lang.String, boolean) 
(/usr/lib64/libgcj.so.6.0.0)
   at java.lang.ClassLoader.loadClass(java.lang.String) 
(/usr/lib64/libgcj.so.6.0.0)
   at org.xnap.loader.XNapLoader.invoke(java.lang.String, boolean, 
java.lang.String[]) (Unknown Source)
   at org.xnap.loader.XNapLoader.main(java.lang.String[]) (Unknown Source)
   at .main (/usr/lib64/libgij.so.6.0.0)
   at .__libc_start_main (/lib64/libc-2.3.5.so)
Could not find suitable loader file, giving up

I'm no expert in java at all and have no clue where to look for a solution. 
Besides that I think it may have something to do with this new 1.5.0 java or 
the fact that I'm on a 64 bit system.

Anyone who can help me going with this ?

Thanks,
Marcel