TeamCity FTPS Upload - 521 PROT P required

Hey.

I'm trying to add a build step that uses FTPS (not SFTP) to upload some files to a server.
The server uses FileZilla Server, and have a valid certificate.

When ever I try to upload I get the same error: "521 PROT P required"

My build step looks like the following:

My build step execution:

The response I get on the server is the following:

I have tried to turned the required PROT P off on the server and that works, allowing me to to transfer the files. However this is not an option once we move to production so PROT P must be forced!

I have also tried to connect to the FTPS Servcer from my local machine using FileZilla Client. This works fine as it sends the PROT P command:

I have tried to google the problem and found the following: https://stackoverflow.com/questions/22615019/ftps-implicit-tls-ssl-error

Here it is stated that the command 'set ftp:ssl-protect-data true' should fix the issue.

My question is: How to I set this command using TeamCity's 'FTP Upload' build step?

If this command cannot be set, then the option to use FTPS is really that useful in my opinion