SKYPE4COMLib unable to send message to another user

Question

We are doing windows based automation software that uses skype com library.

With SKYPE4COMLib i am trying to send message to another skype user from C# application with below given code.

var friendSelected = listBox1.SelectedItem;
            foreach (User user in skype.Friends)
            {
                ChatMessage LiveMess = new ChatMessage();
                if (user.Handle == friendSelected.ToString())
                    LiveMess = skype.SendMessage(user.Handle, "Nice Well");
            }

Even though method skype.SendMessage is executing properly without any exception. It is not sending message across.

Any help in this case will be helpful.