starting Jboss using debug mode has error

Hi,

    I tried to start JBoss with debug mode and encountered the following
error

Transport dt_socked failed to initialize, rc = 509.
FATAL ERROR in native method: No transports initialized

I am using JDK1.4, java version "1.4.2_03"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.2_03-b02)
Java HotSpot(TM) Client VM (build 1.4.2_03-b02, mixed mode

under Sun OS8.

The command I execute is

java -server -Xms128m -Xmx512m -Dprogram.name=run-debug.sh -Xdebug
-Xnoagent -Djava.compiler=NONE
-Xrunjdwp:transport=dt_socked,server=y,suspend=n,address=4142

I read some messages from web saying if I put lib directories containing
libdt_socket.so  in PATH , it will work, but it did not work for me.
I want to get help to reslove this problem.

Thanks
Allen