some config problem

gistfile1.yml

parameters:
    kp_media: 
        linkmap: 
            "Sylius\\Sandbox\\Bundle\\AssortmentBundle\\Entity\\Product": "kp\\MediaBundle\\Entity\\ProductMedia"
        uploader:
            media_path: uploads
            www_root: public
        imager:
            options:
                lib: gd
                thumbnails: 
                    small: { width: 128, height: 128, dir: 't1' }