At 2MHost, you can set number of PHP variables from your cpanel instead of using php_value in .htaccess or using custom php.ini file:
You can't modify this variables of the native PHP version (the PHP that runs all websites in the server) so you need first to choose a non-native PHP version from your cpanel:
Remember that you have to adjust post_max_size to be equal or bigger than upload_max_filesize, both variables are responsible of files uploading