Connection failed.

I have a problem connecting to my website using winscp,

every time I connect it is always "connection failed", I have tried to connect to my other website but it's still the same,
I installed it again but it still failed

this is my screenshoot "connection failed"

Can you connect using any other client using the same protocol?
Did you try to contact the server's Administrator?

You actually didn't answer any of my questions:
https://winscp.net/forum/viewtopic.php?t=6638#88567