Can't run reprap in Fedora 64 (Java problem)

[root@computer reprap-mendel-20100719]# reprap
java.lang.UnsatisfiedLinkError: /usr/local/reprap-mendel-20100719/librxtxSerial.so: /usr/local/reprap-mendel-20100719/librxtxSerial.so: wrong ELF class: ELFCLASS32 (Possible cause: architecture word width mismatch) thrown while loading gnu.io.RXTXCommDriver
Exception in thread "RepRap" java.lang.UnsatisfiedLinkError: /usr/local/reprap-mendel-20100719/librxtxSerial.so: /usr/local/reprap-mendel-20100719/librxtxSerial.so: wrong ELF class: ELFCLASS32 (Possible cause: architecture word width mismatch)
	at java.lang.ClassLoader$NativeLibrary.load(Native Method)
	at java.lang.ClassLoader.loadLibrary0(ClassLoader.java:1750)
	at java.lang.ClassLoader.loadLibrary(ClassLoader.java:1675)
	at java.lang.Runtime.loadLibrary0(Runtime.java:840)
	at java.lang.System.loadLibrary(System.java:1047)
	at gnu.io.CommPortIdentifier.(CommPortIdentifier.java:83)
	at org.reprap.comms.GCodeReaderAndWriter.openSerialConnection(Unknown Source)
	at org.reprap.comms.GCodeReaderAndWriter.(Unknown Source)
	at org.reprap.machines.GCodeRepRap.(Unknown Source)
	at org.reprap.machines.MachineFactory.create(Unknown Source)
	at org.reprap.Main.(Unknown Source)
	at org.reprap.Main$12.run(Unknown Source)
	at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:226)
	at java.awt.EventQueue.dispatchEvent(EventQueue.java:602)
	at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:275)
	at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:200)
	at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:190)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:185)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:177)
	at java.awt.EventDispatchThread.run(EventDispatchThread.java:138)

#!/bin/sh
cd /usr/local/reprap-mendel-20100719
./reprap

[root@Anvil lib]# yum install libjava3d-jni
Loaded plugins: presto, refresh-packagekit
Setting up Install Process
No package libjava3d-jni available.
Nothing to do

#!/bin/bash
# reprap-host -- runs RepRap Java host with an appropriate classpath

REPRAP_RAM_SIZE=1024M                # Amount of RAM to allow Java VM to use
REPRAP_DIR=`dirname $0`       # reprap.jar, jni libs and stl file

cd $REPRAP_DIR

# build up classpath
# when we move to OpenJDK/Java-6 these next few can be replaced with wildcard
# *.jar and we will not need swing-layout any more.
CLASSPATH=./reprap.jar
CLASSPATH=$CLASSPATH:./j3dcore.jar
CLASSPATH=$CLASSPATH:./j3d-org-java3d-all.jar
CLASSPATH=$CLASSPATH:./j3dutils.jar
CLASSPATH=$CLASSPATH:./vecmath.jar
CLASSPATH=$CLASSPATH:./RXTXcomm.jar
CLASSPATH=$CLASSPATH:./swing-layout-1.0.3.jar
CLASSPATH=$CLASSPATH:.

# invoke the code
java -cp $CLASSPATH -Xmx$REPRAP_RAM_SIZE -Djava.library.path=/usr/lib/jni/

[root@Anvil reprap-mendel-20100719]# ./reprap
Usage: java [-options] class [args...]
           (to execute a class)
   or  java [-options] -jar jarfile [args...]
           (to execute a jar file)
where options include:
    -d32	  use a 32-bit data model if available
    -d64	  use a 64-bit data model if available
    -server	  to select the "server" VM
                  The default VM is server.

    -cp 
    -classpath 
                  A : separated list of directories, JAR archives,
                  and ZIP archives to search for class files.
    -D=
                  set a system property
    -verbose[:class|gc|jni]
                  enable verbose output
    -version      print product version and exit
    -version:
                  require the specified version to run
    -showversion  print product version and continue
    -jre-restrict-search | -jre-no-restrict-search
                  include/exclude user private JREs in the version search
    -? -help      print this help message
    -X            print help on non-standard options
    -ea[:...|:]
    -enableassertions[:...|:]
                  enable assertions with specified granularity
    -da[:...|:]
    -disableassertions[:...|:]
                  disable assertions with specified granularity
    -esa | -enablesystemassertions
                  enable system assertions
    -dsa | -disablesystemassertions
                  disable system assertions
    -agentlib:[=]
                  load native agent library , e.g. -agentlib:hprof
                  see also, -agentlib:jdwp=help and -agentlib:hprof=help
    -agentpath:[=]
                  load native agent library by full pathname
    -javaagent:[=]
                  load Java programming language agent, see java.lang.instrument
    -splash:
                  show splash screen with specified image
See [java.sun.com] for more details.

ln -sf /usr/lib/librxtxSerial.so .

ln -sf /usr/lib/jni/librxtxSerial.so .