How do I change the No Transfer Timeout?

I'm doing some testing on a live server and so need to upload the odd file every 5 minutes or so... however I keep getting:

421 No Transfer Timeout (300 seconds): closing control connection.
Connection closed

and have to refresh the connection. This is getting VERY tedious!

How can i change this?

Nothing can be done. The server is kicking you off for being idle.

In order to stay connected, you will have to download/upload a file
before the five minute (300 seconds) time frame.

SmartFTP has a "Keep Alive" function, but servers such as Serv-U
look for an actual file transfer to take place, so the feature is useless.

You can try contacting the owner of the server, and they might remove
the idle timeout feature for your account login to the server. Good Luck!