[snakes1100]

Im sorry, your server is not setup to allow the use of either, as your server is a dedicated server, you can simply edit the master php.ini file and then restart apache.

1. ssh into server as root, if direct root access is disabled or blocked thru ssh, log in as the admin user, then "su root"
2. nano /etc/php.ini (with plesk it may use another, check your php info in the admincp, sometimes it can be /usr/local/lib/php.ini. If not do "php -i | more" from the command line, you'll see a line such as this "Loaded Configuration File => /etc/php5/cli/php.ini").
3. change this value "memory_limit = 64M" to this "memory_limit = 128M" and restart your web server.