Laravel: PHP Fileinfo extension to use Intervention Image message

Hi on my localhost i can upload images perfect with Image Intervention. On my server i can't the say: Fileinfo extension must be installed/enabled to use Intervention Image. I change my PHP Version to 5.3.29 before are in 5.6. I enable File Info but still not working. After upload i delete vendor and i run

composer install

and

composer dump-autoload

and later i upload it to my server but the problem continues. Here my composer.json file:

 "require": {
        "php": ">=5.3",
        "laravel/framework": "5.2.*",
        "laravelcollective/html":"*", 
        "laracasts/flash": "^2.0",
        "cviebrock/eloquent-sluggable": "^4.0",
        "intervention/image": "^2.3",
        "laravel/socialite": "^2.0",
        "cviebrock/image-validator": "^2.1"
    },
    "require-dev": {
        "fzaninotto/faker": "~1.4",
        "mockery/mockery": "0.9.*",
        "phpunit/phpunit": "~4.0",
        "symfony/css-selector": "2.8.*|3.0.*",
        "symfony/dom-crawler": "2.8.*|3.0.*"
    }, 

Some one can help me here? Thanks :)

via Chebli Mohamed