Sql error using MAMP with rails 1.1



I am newbie and i am using MAMP with rails for trying out few things in
web development.

I just upgraded to rails 1.1 and created a new rails depot project and
when i just gone to change my database.yml, I get this

adapter: mysql
database: depot_development
username: root
password: root
host: localhost

and I added

socket: /Applications/MAMP/tmp/mysql/mysql.sock to the end of database.

and if i generate scaffold i get this error

*Can’t connect to local MySQL server through socket ‘/tmp/mysql.sock’
(2) *

how can i connect my MAMP socket to the database.yml file and go on with
the project.