Increase memory limits. / Increase upload size wordpress , ini

.htaccess

php_value memory_limit 64M
php_value upload_max_filesize 64M
php_value post_max_size 64M
php_value max_execution_time 300
php_value max_input_time 300

php.ini

upload_max_filesize = 64M
memory_limit = 64M
post_max_size = 64M
#file_uploads = On

wp-config.php

<?php
define('WP_MEMORY_LIMIT', '64M');