I have an issue with autoloading appearing to work fine on my local machine but not on our server. I am having an issue once uploaded to the server where it will say Class 'Company\Administration\Models\User' not found. This does not occur on my local windows box running PHP 5.4 (the server is running 5.3.3, which is out of my hands)

The User class in question is found in a file with the path vendor/company/administration/src/Company/Administration/models/User.php

The composer.json from the package in question is as follows:

"autoload": {
        "classmap": [
            "src/migrations"
        ],
        "psr-0": {
            "Company\\Administration": "src/"
        }
    },

If I do a composer update -o before I upload my project then the server side of things works; this isn't too much of an issue as I have a known fix - but I'd like to know if something is wrong with the way I have named my file paths because I would expect it to work without the optimized class map.