Model-problem

Hello.
I have a simple multipart-form that uploads images and saves record in
the database. I have a model that uses the RMagick plugin to save the
images.

My model looks like this:
class Drawing < ActiveRecord::Base

has_attachment :storage => :file_system,
:resize_to => ‘670x503’,
:thumbnails => { :thumb => ‘160x120’, :tiny => ‘50>’ },
:max_size => 5.megabytes,
:content_type => :image,
:processor => ‘Rmagick’
validates_as_attachment
acts_as_rateable

belongs_to :member
belongs_to :drawingcategory
has_many :drawingcomments
end

I also have a drawing-tool done in Flash. The idea is to draw in the
flash-application and then save the drawing online. I have functionality
so I can get the image saved on the server, but I do not know how I can
connect that image to this rmagick-plugin and get the information about
the drawing saved in the same table as the drawings uploaded through the
multipart-form.

I have looked everywhere and tried everything. Anyone who can help me?