Aww. It looks like in phpMyAdmin the default upload size is limited to 2Mb. Usually this should be fixed by adjusting the upload_max_filesize directive in /etc/php5/apache2/php.ini if you’re on Ubuntu 14.04. Else, you could add the following in your .htaccess file:

php_value upload_max_filesize 10M
php_value post_max_size 10M

Replace 10M by the size you desire.