Cannot connect to server (wodSFTP / wodSFTP.NET / wodSFTPdll)

wodSFTP1.Hostname := '*****';
wodSFTP1.Port := 22;
wodSFTP1.Login := '************';
wodSFTP1.Password := '***********';
wodSFTP1.Blocking := true;
try
wodSFTP1.Connect;
except
on E : Exception do
begin
Memo2.Lines.Add(TimeToStr(Time)+'>>'+E.Message);
end;
end;

If I disable blocking, the output is :
8:10:21 AM>>Connecting to server
8:10:21 AM>>Disconnected from server

If I enable it, it is :
8:10:21 AM>>Connecting to server
8:10:21 AM>>Disconnected from server
8:10:21 AM>>Unrecognized Error