winscp login fails when i try to connect Check Point Firewal

winscp login fails when i try to connect Check Point Firewall.

i install winscp 3.7.3
i go to session, enter the firewall ip, port 22, username and password, protocol sftp (allow scp fallback) and login.

i got error message: error skipping startup message. your shell is probably incompatible with the application BASH is recommended).
Connection has been unexpectedly closed. server command exit status 0.

the firewall installed on SPLT (Check Point Secure Platform)

Help me,

Check Point Firewall does not support SFTP. I probably supports SCP, but only the scp command. WinSCP needs more to allow the GUI. See requirements.