Hello ;
Sorry, my fault 
I forgot to add the column in db schema for new install... I was sick this week, which can explain many things...
For new installation, this is the database.sql file that is used to create db schema 
In version 2.0.0, such error will not occurs because we will use migration as done in RoR: http://edgeguides.rubyonrails.…ve_record_migrations.html