ant & jedit

I tried to install JEdit but it failed when using the 'ant' command
it says:


Exception in thread "main" java.lang.NoClassDefFoundError:
org/apache/tools/ant/Main

I checked my java setting, I'm using blackdown-jdk-1.3.1, and everything
seems to be ok :'(

(btw j2sdk-1.4.0-02 is missing libstdc++-libc6.1-1.so.2 and when you run
javac or java , etc you get :
 error while loading shared libraries: 
libstdc++-libc6.1-1.so.2: cannot load shared object file: No such file
or 
directory

i checked the /lib /usr/lib but there no file like
libbstdc++-libc6.2-2.so.3  to link with libstdc++-libc6.1-1.so.2)

any ids

thx
anpu