The Server's host keywas not found in the cache

Hi All,
I downloaded winscp client onto my pc. I have a .txt file that is used in my ssis package to connect to the remote server and transfer the files. The job runs w/o any errors and loads the files, but when i did the same thing on my development server w/o any changes made i'm getting the following error:
The Server's host keywas not found in the cache. You have no guarantee that the server is the computer you think it is. The Server's fingerprint is ........... If you trust this host press YES. To connect without adding host to the cache press NO. To abandon the connection press Cancel. I'm running this manually and the winscp wont give me a chance to press any option, also it would be a problem once i automate it.

Please need help.

Thanks

Please read:
https://winscp.net/eng/docs/scripting#hostkey
and
https://winscp.net/eng/docs/scripting#configuration

Thanks a lot :D