Java SE (Java Platform, Standard Edition)

So, I've tried this with multiple JVM's and it never creates a heap dump file. Tried it with and without the -XX:HeapDumpPath option set. According to this...

http://java.sun.com/javase/6/webnotes/trouble/TSG-VM/html/gdaog.html#gbzrr

I should be seeing something like this...

Dumping heap to java_pid2262.hprof ...
Heap dump file created [531535128 bytes in 14.691 secs]

But I don't. Just the following...

C:\temp>java com.localhost.oom.Main -Xms12m -Xmx12m -XX:+HeapDumpOnOutOfMemoryError -XX:HeapDumpPath=C:\temp\oom.hprof
init...
Exception in thread "main" java.lang.OutOfMemoryError: Java heap space
at java.util.HashMap.<init>(HashMap.java:181)
at java.util.HashMap.<init>(HashMap.java:193)
at com.localhost.oom.Main.main(Main.java:28)

C:\temp>java com.localhost.oom.Main -Xms12m -Xmx12m -XX:+HeapDumpOnOutOfMemoryError
init...
Exception in thread "main" java.lang.OutOfMemoryError: Java heap space
at java.util.HashMap.<init>(HashMap.java:181)
at java.util.HashMap.<init>(HashMap.java:193)
at com.localhost.oom.Main.main(Main.java:28)

C:\temp>java -version
java version "1.5.0_16"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.5.0_16-b02)
Java HotSpot(TM) Client VM (build 1.5.0_16-b02, mixed mode)

Any ideas what I'm doing wrong???