Dalvik error with JRuby with SL4A

I'm getting this error when trying to run a jruby script on SL4A

Dalvik VM unable to locate class 'org/jruby/Main' 
java.lang.NoClassDefFoundError: org.jruby.Main

I see the jruby.jar file is installed

# find org.ruboto.sl4a/
org.ruboto.sl4a/
org.ruboto.sl4a/jruby_extras.zip
org.ruboto.sl4a/extras
org.ruboto.sl4a/extras/jruby
or开发者_运维百科g.ruboto.sl4a/extras/jruby/jruby.jar
org.ruboto.sl4a/jruby_scripts.zip
org.ruboto.sl4a/dalvik-cache

Any ideas? Is this a permissions problem? I have a rooted phone running CM7

Since you tagged your question with Ruboto, have you tried building your app as a Ruboto app? That may prove easier.