How to display attribute of a related table ?

[LeoSMeira]

@column_store = column_store_for Account do |cm|
cm.add :name
cm.add :surname
cm.add :email
cm.add "store.nome", "Loja" #
<----------------------------------------------
cm.add :created_at, :renderer => :datetime, :align => :right
cm.add :updated_at, :renderer => :datetime, :align => :right
end

In the table column of index, show only "Not Found"

[LeoSMeira]

I'm using:

Ruby 1.8.7
Rails 2.3.8
Lipsiadmin 5.1.2
Mysql