Mysql4.1.xでは、MySQL の Ruby API が使えないと言うことで、
ruby-mysql-0.2.6 のアンインストールをしたところ、

$ find /usr/local/lib/ruby/....../ -name mysql.rb
$ rm /usr/local/lib/ruby/....../mysql.rb

このエラーは出なくなりました。
　Client does not support authentication protocol requested by server;
　consider upgrading MySQL client


しかし前から出ていたエラーはでたままで、そのエラーは以下になります。
このエラーの回避策はありますでしょうか？
既存データベースをRailsにあった新規データベースとして作り直すか、変換ツー
ルなどを使って開発することのほうが好ましいのでしょうか？
宜しくお願いいたします。

SyntaxError in TemplateController#index 
(eval):1:in `instance_eval': compile error
(eval):1: syntax error
Object::1

/usr/local/lib/ruby/gems/1.8/gems/activerecord-1.14.4/lib/active_record/base.rb:1244:in `instance_eval'
/usr/local/lib/ruby/gems/1.8/gems/activerecord-1.14.4/lib/active_record/base.rb:1244:in `instance_eval'
/usr/local/lib/ruby/gems/1.8/gems/activerecord-1.14.4/lib/active_record/base.rb:1244:in `compute_type'
/usr/local/lib/ruby/gems/1.8/gems/activerecord-1.14.4/lib/active_record/base.rb:983:in `instantiate_without_callbacks'
/usr/local/lib/ruby/gems/1.8/gems/activerecord-1.14.4/lib/active_record/callbacks.rb:215:in `instantiate'
/usr/local/lib/ruby/gems/1.8/gems/activerecord-1.14.4/lib/active_record/base.rb:390:in `find_by_sql'
/usr/local/lib/ruby/gems/1.8/gems/activerecord-1.14.4/lib/active_record/base.rb:390:in `collect!'
/usr/local/lib/ruby/gems/1.8/gems/activerecord-1.14.4/lib/active_record/base.rb:390:in `find_by_sql'
/usr/local/lib/ruby/gems/1.8/gems/activerecord-1.14.4/lib/active_record/base.rb:924:in `find_every'
/usr/local/lib/ruby/gems/1.8/gems/activerecord-1.14.4/lib/active_record/base.rb:381:in `find'
/usr/local/lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_controller/pagination.rb:182:in `find_collection_for_pagination'
/usr/local/lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_controller/pagination.rb:198:in `paginator_and_collection_for'
/usr/local/lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_controller/pagination.rb:129:in `paginate'
app/controllers/template_controller.rb:12:in `list'
app/controllers/template_controller.rb:3:in `index'



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