Paperclip won't save image in Rails app

I am trying to use Paperclip with my Rails app to add an avatar to a user but it won't save my image or update the database column when creating the user. This is what the model looks like: ``` class User < ActiveRecord::Base has_attached_file :avatar ``` And the registerform in haml: ``` - form_for :user, @user, :url => { :action => "signup" }, :html => { :multipart => true } do |f| ... ... %li %div{:class => "header"} Profilepicture %div{:class => "input"} = f.file_field :avatar ``` And when I look in the log this is what is being passed to the "signup" action: ``` Parameters: {"commit"=>"Save", "action"=>"signup", "controller"=>"user/register", "user"=>{"name"=>"Micke Lisinge", "birthmonth"=>"07", "password_confirmation"=>"[FILTERED]", "nickname"=>"lisinge", "avatar"=>#<File:/tmp/RackMultipart20100426-3076-1x04oxy-0>, "gen"=>"m", "birthday"=>"23", "password"=>"[FILTERED]", "birthyear"=>"1992", "email"=>"lisinge@gmail.coma"}} [paperclip] Saving attachments. ``` Paperclip says it is saving the template but when I look in the `public` folder in my app it has created a `system` but the `system` folder is empty. So it seems like it isn't saving the picture to the folder. It gets handled by the form and saved in my `/tmp` folder. Maybe you guys have any tips or know what this problem might be?