I met exception when installed WM6.1 in Linux

Hey,

When i tried to install the WM 6.5 in Linux, it throwed “Exception in thread “main” java.lang.NoClassDefFoundError: webMethodsInstaller651.jar
at gnu.gcj.runtime.FirstThread.run() (/usr/lib/libgcj.so.5.0.0)
at _Jv_ThreadRun(java.lang.Thread) (/usr/lib/libgcj.so.5.0.0)
at _Jv_RunMain(java.lang.Class, byte const, int, byte const, boolean) (/usr/lib/libgcj.so.5.0.0)
at __gcj_personality_v0 (/home/cw/java.version=1.4.2)
at __libc_start_main (/lib/tls/libc-2.3.4.so)
at _Jv_RegisterClasses (/home/cw/java.version=1.4.2)”.

My jdk version is j2sdk1.4.2, and my installer version is 6.5.1.