It seems that the process does not have a write access to TEMP folder. Try setting Session.XmlLogPath to point to a folder, where you have a write access too, like C:\Data\WorkFlow\TempFiles\something.xml

WinSCP should have reported a more meaningful error message, which might have lead you to this solution. But there's a bug that prevented that:
https://winscp.net/tracker/1744

Hi,

Can anyone see what's going on with my connection, seems to be connecting to the server, but then fails to complete the connection negotiation?

Thanks in advance! :)

Classic ASP / VBScript:
===================
Dim sessionOptions
Set sessionOptions = Server.CreateObject("WinSCP.SessionOptions")
With sessionOptions
.Protocol = 1 '1=SCP
' .Protocol = Protocol_Scp
.FtpMode = 1 '0 Passive, 1 Active
.HostName = "192.168.207.100"
.UserName = "admin"
.Password = "P@ssw0rd"
.GiveUpSecurityAndAcceptAnySshHostKey = "true"
.TimeoutInMilliseconds = 60000
' .SshHostKeyFingerprint = "ssh-rsa 2048 81:58:4b:b7:0b:7a:56:e1:1a:7e:e4:17:79:c7:34:ea"
End With

'response.write sessionOptions.FtpMode

Dim sessiona
Set sessiona = Server.CreateObject("WinSCP.Session")
sessiona.DebugLogPath = "C:\Data\WorkFlow\TempFiles\DebugLog2.txt"
sessiona.DebugLogLevel = 1
sessiona.sessionLogPath = "C:\Data\WorkFlow\TempFiles\SessionLog2.txt"
' Connect
sessiona.Open(sessionOptions)


' Disconnect, clean up
sessiona.Dispose
================