Conneting through ASP.NET WebService Issue.

Hi Martin Prikryl,
In the following scenarios', when implementing in ASP.NET Webservice WinSCP.com is behaving little strange compared to Windows application. Following works fine when using in Windows application.
WinSCP client resides on the same WebServer.

1. open mysession
ERROR :

Searching for host...
Host does not exist

2. winscp.StartInfo.Arguments = "/log=" + logname;

ERROR: Cannot create Log file.

3. HOST_KEY Issue:

ERROR: The server's host key was not found in the cache. You have no guarantee that the server is the computer you think it is.
The server's rsa2 key fingerprint is:
ssh-rsa 1024 94:45:5e:00:18:d0:a3:34:c1:0e:db:48:17:b0:a6:f5
If you trust this host, press Yes. To connect without adding host key to the cache, press No. To abandon the connection press Cancel.

Could you help me on this...

Thanks in advance

Would this article help?
https://winscp.net/eng/docs/faq_scheduler