> I attached the development log..
>
> It says something about sqlite.. Probably it tries to find something
> different than mysql?
>
> How to I make knows that it needs mysql?



If you're using mysql, you should have the following in your
config/database.yml:

development:
  adapter: mysql
  server: localhost
  user: [your username]
  password: [your password]
  database: [database name]

Rails uses sqlite3 by default so if you don't have it your app won't start
properly.

--
James Coglan
http://jcoglan.com