It should work on 64bit machines no problem. If you can't get it to work I would recommend simply adding the JVM options for debugging yourself. For example on an Adobe ColdFusion machine you need to add the following options to the jvm.conf file:
-Djava.compiler=NONE -Xnoagent -Xdebug
-Xrunjdwp:transport=dt_socket,server=y,suspend=n,address=
8000
Don't forget to remove the following option if used : -XX:+UseParallelGC