The idea behind the commands is that some protocols, such as FTP, have a well known port 21 to request data from the server, but it can use any port between 1024 and 65535 for data reception. This creates two independent, but related, connections, yet the firewall is unable to associate them and filter properly, thus, likely dropping packets from server. That is what I assume is the issue. Helper, which is enabled by the commands above, enables a mechanism, which relates these connections and creates an exception in the firewall to accept them.
Have you tried it and did it help?