Session Open: Connection has been unexpectedly closed. Server sent command exit status 0.

Access Denied. Authentication failed.
Hi, I'm trying to open a connection to a SFTP server. I'm able to connect with the standalone WinSCP.exe. I can connect to other SFTP servers with the attached code. Yet this connection gives me the error. Any ideas?
Thanks!

Forgot to mention this.

Thank you for your consideration. It turns out there was a different protocol setting was being used on the server. Working ok now.
Thank you,
tk