2.0.2 Postgres don't work

i am also same problem please give me solution . I am getting below error C:/Ruby187/lib/ruby/gems/1.8/gems/activerecord-2.3.5/lib/active_record/connectio n_adapters/abstract/connection_specification.rb:76:in `establish_connection': Pl ease install the postgres adapter: `gem install activerecord-postgres-adapter` ( no such file to load -- active_record/connection_adapters/postgres_adapter) (Run timeError)

i am using

What's your full list of gems installed? Back when I had problems like these it was because I had both the pg and another of the postgres drivers installed, although I can't remember which exact one right now.