SSL_connect: error in SSLv2/v3 read server hello A

I would like use Keepass 2.20.1 and its plugin IOProtocoleExt 1.6 to connect to my database via FTPS. 
Normally it uses the port 990 but for firewall security reasons, i have to use port 22. 
On port 990 it perfectly works, but for the port 22 it is not the same

Here is the WinScp Error message :

SSL_connect: error in SSLv2/v3 read server hello A 
Can‘t establish SSL connection 
Disconnected from server 
Connection failed.

I tested with success with Filezilla.

The FTPS is a IIS 7.5 running on a server 2008 R2 
The certificate is a self signed one.

解决方法：

It looks like you are using Explicit TLS with Filezilla, while Implicit SSL/TLS with WinSCP.

Try using Explicit TLS with WinSCP too.