Did you also change your environment file?

No I haven't, how would I do that?

I'm referring to your .env file in root folder.

I'm not sure where the .env file is. I'm working with Laravel in netbeans, and can't find it in my server.

It should be in the root directory of your laravel project, same directory as artisan and composer.json files.

Files starting with a dot are considered hidden files, so some file managers and ftp clients can hide them (and skip while copying). See, if you have some sort of "Show hidden files" option in your file manager, and make sure you've actually copied .env file to your server.

Otherwise you can set up your database credentials via environment variables, or, if all else fails, config/database.php file

And turn on error reporting: http://stackoverflow.com/questions/74847/what-is-the-recommended-error-reporting-setting-for-development-what-about-e