Can't edit FileZilla Server.xml file programatically in Windows 7 using C#?

I have using filezilla[version 0.9.39 beta] with my C# windows Form Application.So, I have added users and corresponding shared directory programatically in C:\Program Files\FileZilla Server\FileZilla Server.xml file.But when i open the Filezilla Server Interface and see the users list on the right hand side box, it never displays the users list that are added on the above mentioned file.[see attached image]

How do i add users programatically in filezilla server.xml file.

Please guide me to get out of this issue?

Thanks & Regards,
P.SARAVANAN

---