In the login window, there is a password input box for an HTML server control. The password box is submitted. The Submit button is not responding. After the discovery, one or more text input controls must be added to the page, the Button control can respond to the carriage return Click event. In desperation, I have to put a TextBox control and set it to 0 (without affecting the visual effect, because it is visually able to have only one text input box).
