Cannot run freetts libraries in NB 6.5 (Using Java Libraries in Rails Application tutorial)

I've been trying the NB 6.1 Using Java Libraries in Rails Application tutorial, at http://www.netbeans.org/kb/61/ruby/java-ruby.html. When I run the project, I get a java.lang.OutOfMemoryError: Java heap space. Output attached. speak.htm My guess is that there is something about either my JDK (6_u11) or the Ruby/JRuby version that doesn't play nicely with freetts, which is from 2005 after all. I've double-checked that all my alterations to the rubyweblog project were identical with the tutorial, and they are. Has anyone got any idea what is wrong?

jeff