[Ironruby-core] WARNING: YAML.add_builtin_type is not implemented

[Eduardo Blumenfeld]

Hi all:

I have the following gems installed
--------------------------
actionmailer (2.3.8)
actionpack (2.3.8)
activerecord (2.3.8)
activerecord-sqlserver-adapter (2.3.8)
activeresource (2.3.8)
activesupport (2.3.8)
dbi (0.4.3)
deprecated (3.0.0)
rack (1.1.0)
rails (2.3.8)
rake (0.8.7)
rubygems-update (1.3.7)
shoesgem (0.1469.0)
--------------------------

whenever I run a program with:
--------------------------
require 'rubygems'
require 'active_record'
require 'active_support'
require 'yaml'
...

I receive a warning:
----------------------------------
WARNING: YAML.add_builtin_type is not implemented
----------------------------------

any clues?

Thank you in advance...
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