The default upload limit is 200MB, regardless of upload limit of your Global PHP. To increase this limit go to:

Main > Websites > List Websites and choose Manage for the one you want to change the upload limits for. Next go to vHost Conf and add the following lines:

php_value upload_max_filesize “400M”

php_value post_max_size “400M”

This will change the default upload limits, despite what is set in php.ini