请高手赐教：wrong ELF class: ELFCLASS64，十分感谢

通过jni编程，java程序GetPid调用c接口，出现下面问题：
linux-z03057:~/workspace/CtoJavaTest #  
linux-z03057:~/workspace/CtoJavaTest # javac GetPid.java
linux-z03057:~/workspace/CtoJavaTest # g++ -I/home/z03057/src/jdk1.6.0/include -I/home/z03057/src/jdk1.6.0/include/linux -w -fPIC -DPIC -o testdll.so -shared GetPid.c

运行时，出现以下错误：
linux-z03057:~/workspace/CtoJavaTest # java GetPid
/home/z03057/src/jdk1.6.0/jre/lib/i386/client:/home/z03057/src/jdk1.6.0/jre/lib/i386:/home/z03057/src/jdk1.6.0/jre/../lib/i386:.:/home/z03057/src/jdk1.6.0/jre/l                    ib/i386/client:/home/z03057/src/jdk1.6.0/jre/lib/i386:/lib:/usr/lib:/usr/java/packages/lib/i386:/lib:/usr/lib
[COLOR="Red"]Exception in thread "main" java.lang.UnsatisfiedLinkError: /root/workspace/CtoJavaTest/testdll.so: /root/workspace/CtoJavaTest/testdll.so: wrong ELF class: ELFCLASS64
        at java.lang.ClassLoader$NativeLibrary.load(Native Method)
        at java.lang.ClassLoader.loadLibrary0(ClassLoader.java:1751)
        at java.lang.ClassLoader.loadLibrary(ClassLoader.java:1676)
        at java.lang.Runtime.loadLibrary0(Runtime.java:823)
        at java.lang.System.loadLibrary(System.java:1030)
        at GetPid.<clinit>(GetPid.java:5)[/COLOR]