error when installing JRuby

Whenever I try to install JRuby, I get the following error. This is on
AIX 5.3-5.

root@nycserv-deva-app1nim:/usr/local/bin/ruby_inst/jruby-1.1.2>bin/jruby
rubyfile.rb
The java class is not found: org.jruby.Main

The only pre-req I am missing is Apache Ant. When I go to install that,
I get the following.

/usr/local/bin/apache_inst/apache-ant-1.7.0>sh build.sh install-lite

src/main/org/apache/tools/ant/taskdefs/Delete.java:583: cannot find
symbol
symbol : method add(org.apache.tools.ant.types.resources.Restrict)
location: class org.apache.tools.ant.types.resources.Sort
            s.add(exists);
             ^
src/main/org/apache/tools/ant/util/ResourceUtils.java:181: incompatible
types
found : org.apache.tools.ant.types.resources.selectors.Or
required:
org.apache.tools.ant.types.resources.selectors.ResourceSelector
            r.add(new And(new ResourceSelector[] {Type.FILE, new Or(
                                                             ^
src/main/org/apache/tools/ant/util/ResourceUtils.java:181: cannot find
symbol
symbol : method add(org.apache.tools.ant.types.resources.selectors.And)
location: class org.apache.tools.ant.types.resources.Restrict
            r.add(new And(new ResourceSelector[] {Type.FILE, new Or(
             ^
src/main/org/apache/tools/ant/types/resources/selectors/Or.java:50:
cannot find symbol
symbol : method getSelectors()
location: class org.apache.tools.ant.types.resources.selectors.Or
        for (Iterator i = getSelectors(); i.hasNext():wink: {
                          ^
src/main/org/apache/tools/ant/types/resources/selectors/And.java:50:
cannot find symbol
symbol : method getSelectors()
location: class org.apache.tools.ant.types.resources.selectors.And
        for (Iterator i = getSelectors(); i.hasNext():wink: {
                          ^
Note: * uses or overrides a deprecated API.
Note: Recompile with -Xlint:deprecation for details.
Note: Some input files use unchecked or unsafe operations.
Note: Recompile with -Xlint:unchecked for details.
47 errors
... Failed compiling Ant classes !
Bootstrap FAILED

Has anyone seen this before.
Param

Have you considered using the binary distribution?

http://dist.codehaus.org/jruby/jruby-bin-1.1.2.tar.gz

Ant is not required to get up and running with it.

/Nick