SAP PI 7.31- File to File error; Unable to create pooled resource, unexpected reply code XFB

Hi Gurus,

This is a file to file scenario where im placing this file from my source directory to an SFTP using SSH Keys-(private/public). Im getting error saying unable to create new pooled resource. unexpected reply code 2.0XFB: gateway.

Please note for connection i need a username which i used and using SSH keys for connecting. The port and username are all correct.

Please advise.

I always award points for helpful answers

Thanks in advance