In order to use JAVA_OPT you need to run it with below:
-Xdebug -Xrunjdwp:transport=dt_socket,server=y,suspend=n,address=1044
If you are using it through Eclipse for Java 5 or above, you need to execute it with:
-agentlib:jdwp=transport=dt_socket,server=y,suspend=y,address=1044