Redmine

Hello all,

I am new to Ruby and Redmine. I am trying to install Redmine 0.87 using postgresql on a Fedora Core 12 machine, but I get a
uninitialized constant ActiveRecord::ConnectionAdapters::PostgreSQLAdapter::PGconn error.

I include the trace in the text file attached.

Here's some information on the context of the error:

My database.yml

production:
adapter: postgresql
database: redmine
host: localhost
username: redmine
password: mypass
encoding: utf8

ruby script/about

About your application's environment
Ruby version 1.8.6 (i386-linux)
RubyGems version 1.3.5
Rails version 2.1.2
Active Record version 2.1.2
Action Pack version 2.1.2
Active Resource version 2.1.2
Action Mailer version 2.1.2
Active Support version 2.1.2
Edge Rails revision unknown
Application root /opt/redmine-0.8.7
Environment development
Database adapter postgresql

Here's some info on the postgres available at my machine:

postgresql-8.4.1-3.fc12.i686
postgresql-libs-8.4.1-3.fc12.i686
postgresql-server-8.4.1-3.fc12.i686
postgresql-devel-8.4.1-3.fc12.i686

Thanks in advance.

Pavlos