attachment_fu

First at all sorry if my english is not the best

I have a problem with this plugin. It has been installed because we need to upload images in our web. We need 3 kinds of images with different sizes.

this is our code:

Image model:

class Image < ActiveRecord::Base . . .

has_attachment :content_type => ['image/jpeg', 'image/pjpeg', 'image/gif', 'image/jpg', 'image/png'],                               :storage => :file_system,                               :path_prefix => 'public/images',                               :size => 1.kilobyte..300.kilobytes,                               :resize_to => '700>',                               :thumbnails => { :titular1 => '220>', :titular2 => '150>', :foro => '440>' },                               :processor => :MiniMagick

  validates_as_attachment