Communication channel Error for SFTP Adapter

Hi All,

We have configured private key based authentication for SFTP communication channel in Integration Directory.

But, in the RWB we are getting error for the communication channel as below

"Exception received: java.lang.UnsupportedOperationException: received authentication request from server which could not be processed: destination=ftpadm@portnumber; name=; instruction=prompt=Account locked due to 15 failed logins Password: "

Can you please help to resolve this behaviour of the comunication channel.

Thanks,

Kasi Gupta