Urgent : Host Key Verification Failed

[cemi]

Hi all,

I am using Core FTP Server with SSH (SFTP protocol).
Normally it is working properly. I can connect via FTP Clients.
And we have oracle ERP System on the Unix.
I want to send some files to my FTP (SFTP) server.
I can connect but it is giving error when I try to send any files then It closes the connection.

Error : Host Key Verification Failed

What can I do?

Thanks and regards,
Cem

[cemi]

Thanks for your answer.
My problem is not with Core FTP Pro Client.
And you are right, if I check Putty option , it works.

But I want to send a file from Unix server by custom code.
ERP Team is not using any client tool.
They are using some ftp commands.

I created private and public keys and sent to them.
They configured the server but we have still problem.

Thanks,
Cem