Upload Image and pdf file

I have a project created with cms Django, and in this project i must upload a image and pdf file. the code in models.py is as follow:
http://dpaste.com/793672/

The file with this step to upload, is inserted in correct folder, but the file not work. In Administrator panel, when i click on image or pdf file, that i uploaded, the browser tell me Page not found (404). The current URL, home/alessandro/Scrivania/progetto/static/finale/header_blog.jpg, didn't match any of these. I have verifed the permission, but i have in default chmod 777. Any ideas? I have follow also this tutorial youtube:Video From Yt I have the same code, but not result. Any Ideas? Where is my error? I can send the zip folder with the project, if you want. I try, also, edit the code of models.py in: http://dpaste.com/793673/ but the error there is.Now, I think what I not write correctly the configuration in settings.py. Media_Root, Media_Url, Static_Root, Static_Url are empty. There parameters should not be empty, true? I developer in localhost (on Linux/Ubuntu), web server Apache. What should i write as configuration? With second link, the result is: The object albax with primary key u'20/static/finale/Magic_green_bus_1.jpg' not exits. But the Image file, there is in correct file. Or the Problem is in urls.py, the code is: http://dpaste.com/793124/ Any Ideas?

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