Not able to click the button on File Download with JWinAuto

[Arpan Raj]

Hi folks,
I am new to JWinAuto and AutoIT.
I want to click the save button on the File Download control.
I am able to get the focus on the button but it doesn't click if the current File Download is not in focus. I have set it to top and activated it to have it focused. But still I am not able to click the button.
I am attaching the code here. Can any one please tell if I am missing something..

Any help will be useful.
Thanks in advance.

  private static final WString BLANK_STRING = new WString("");
                private static final WString FILE_DOWNLOAD = new WString("File Download");
                System.out.println("hi..");
                JAutoITx wrapper = JAutoITx.INSTANCE;
                wrapper.AU3_Init();
                wrapper.AU3_WinWait(FILE_DOWNLOAD, BLANK_STRING, 15);
                wrapper.AU3_WinActivate(FILE_DOWNLOAD, BLANK_STRING);
                System.out.println(wrapper.AU3_WinActive(FILE_DOWNLOAD, BLANK_STRING));
                wrapper.AU3_WinSetOnTop(FILE_DOWNLOAD, BLANK_STRING, 0);
                wrapper.AU3_ControlFocus(FILE_DOWNLOAD, BLANK_STRING, new WString(
                                "[CLASS:Button; INSTANCE:2]"));
                wrapper.AU3_ControlClick(FILE_DOWNLOAD, BLANK_STRING, new WString(
                                "[CLASS:Button; INSTANCE:2]"), BLANK_STRING, 1, 6660, 500);
                wrapper.AU3_Send(new WString("s"), 0);