FTP on my Proxy

Basically, I suck at computers, and would like to FTP into my website because it needs some updating. However, problem is that I only have internet access at school where I have to run everything through their proxy. I'm sure there's a way to do this. I've been messing around with the proxy settings in FileZilla but no luck. Some basic information about the school network here.

Any help would be GREATLY appreciated.

Just a suggestion: FTP is really insecure (nonencrypted) as it is. So running your FTP through a proxy is essentially giving someone else free login info to your server.

At minimum, you should consider using FTP over TLS, or SSH/SFTP if possible, assuming your website host supports it.