Redmine

I'm trying to install redmine-1.2.1 and I get the following problem:

$ rake db:migrate RAILS_ENV="development"
(in /home/alaskaair/qa-site/redmine-1.2.1)
rake aborted!
Can't connect to local MySQL server through socket '/tmp/mysql.sock' (2)

I can manually connect to the database from the command line just fine. I'm baffled.
Anyone have a clue?

gem 1.4.2
rails (2.3.11)
rake (0.8.7)
mysql (2.8.1)

$ cat config/database.yml
development:
adapter: mysql
database: redmine_proj
host: localhost
username: redmine
password: secret
encoding: utf8

$ mysql redmine_proj -u redmine -p secret
--ok

Fetching: mysql-2.8.1.gem (100%)
Building native extensions. This could take a while...
Successfully installed mysql-2.8.1
1 gem installed
Installing ri documentation for mysql-2.8.1...

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