Invalid redirect_uri issue

[folivi]

hi,
I'm having an invalid redirect_uri issue when trying to authenticate with facebook on my production app, but no issue in development.
Any idea of what is causing it?
Find my code below

class SessionsController < Devise::OmniauthCallbacksController 
  def facebook
    #raise env.inspect #to_yaml
    user = User.from_oauth(env['omniauth.auth'])
    session[:user_id] = user.uid    
    redirect_to profile_path
  end
end

devise initializer

 config.omniauth :facebook, 'appid', 'secret, :scope => 'email, user_events, publish_actions, user_groups'

in the routes file

devise_for :users, controllers: {omniauth_callbacks: "sessions"}