Rails - May 2006 - getting error like undefined local variable or method `confi

Hi,

This is one of the method in "spam_protection.rb" in typo 2.6.0 
application.
=======================  def article_closed?(record)
    if config[''sp_article_auto_close''] > 0
      if record.article.created_at.to_i < 
config[''sp_article_auto_close''].days.ago.to_i
        logger.info("[SP] Blocked interaction with 
#{record.article.title}")
        return true
      end
    end
  end
======================When I am trying to post comment I am getting error like:-
======================undefined local variable or method `config'' for 
#<SpamProtection:0x35ef4d8>
======================
Why I am getting this error?  Where I am wrong?

Please tell me.
Thanx in advance.
Prash

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