The MailChimp MCAPI library could not be found.

I'm try to set up Mailchimp module but i keep geeting

Failed to load MailChimp PHP library. Please refer to the installation requirements.

My steps:

• disable mailchimp module
• install composer_manager package locally
• run: curl -sS https://getcomposer.org/installer | php on my root
• change composer.json(which lay on my root) - see it below
• run: php composer.phar install --no-dev
• mailchimp/mailchimp directory is installed in my /vendor folder
• clear cache and enable module but still getting the error. In my report i see that the module cannot be found.

Just to specify: I run composer on my local and then upload: composer.json, composer.lock, composer.phar and vendor/mailchimp on my ftp

What i'm doing wrong??

{
    "name": "drupal/composer_manager",
    "type": "drupal-module",
    "description": "Composer Manager is a bridge to best-in-breed, standards compliant PHP libraries that are managed by Composer and Packagist.",
    "homepage": "http://drupal.org/project/composer_manager",
    "license": "GPL-2.0",
    "authors": [
        {
            "name": "Chris Pliakas",
            "email": "opensource@chrispliakas.com",
            "role": "Project Lead"
        },
        {
            "name": "See contributors",
            "homepage": "http://drupal.org/node/1929436/committers",
            "role": "Developer"
        }
    ],
    "support": {
        "issues": "http://drupal.org/project/issues/composer_manager"
    },
    "require": {
        "php": ">=5.3.0",
        "mailchimp/mailchimp": ">=2.0.4"
    }
}

MailChimp module => 7x.3-3

mailchimp library => 2.04