Rails - Mar 2006 - cattr_accessor missing for test of AR

Hello.

I''m trying to test an active record adapter. When launching :

ruby -I "connections\native_adaptername" anytest_test.rb

I have an method missing error, complaining about cattr_accessor 
(missing from AR:Base).

Any advice ?
Tony

PS : ruby 1.9, rails 1.10 install via gems

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