Problem with registering a host key

We connect to an FTP server that recently purchased a new FTP server.
I run the winscp.com program and get the warning: "Continue connecting to an unknown server and add its host key to a cache" message.
I answer "y" to the question it asks if I want to save the new host key to cache.
I also backup to the winscp.ini file which is restored with /ini=winscp.ini parameter.
But when task scheduler runs winscp we still get the warning about an unknown server.
I have tried putting the new host key in the open command in the script that WinSCP runs but it fails to connect and transfer the files.

Is there a way to store the new host key in the "cache" to stop the warning about the new host key?

cheneydd@... wrote:

I have tried putting the new host key in the open command in the script that WinSCP runs but it fails to connect and transfer the files.

Please attach a full session log file showing the problem (using the latest version of WinSCP).