I have a simple example chat demo use Flash like:
The index.html:
Code:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
  "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<!--
  LIGHTSTREAMER - www.lightstreamer.com
  Flash Bridge Stock-List Demo
-->

<html>

<head>
  <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
  <title>Lightstreamer :: Flash Bridge :: Chat Demo</title>
  <link rel="stylesheet" type="text/css" href="css/chat.css" />
  <!-- load Lightstreamer libraries -->
  <script src="../commons/lightstreamer/lscommons.js" type="text/javascript"></script>
  <script src="../commons/lightstreamer/lspushpage.js" type="text/javascript"></script>

  <!-- load Lightstreamer Flash Bridge -->
  <script src="bridge/lsflashbridge.js" type="text/javascript"></script>

  <!-- load some code, shared among most of these demo applications, used for
       creating or seeking the Master Push-Page and the Engine.
       Please study carefully the source code of misc.js to learn how it works
       and to change it at your convenience -->
  <script src="../commons/custom/misc.js" type="text/javascript"></script>
</head>
<body>
	<!-- Flash object -->
	<object classid="clsid:d27cdb6e-ae6d-11cf-96b8-444553540000" codebase="http://fpdownload.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=8,0,0,0" width="400" height="300" id="flashObject" style="margin-left: 12px;">
		<param name="allowScriptAccess" value="sameDomain" />
		<param name="movie" value="demoFlashChat.swf" />
		<param name="quality" value="high" />
		<param name="bgcolor" value="#ffffff" />
		<embed src="demoFlashChat.swf" quality="high" bgcolor="#ffffff" width="400" height="300" name="flashObject" align="middle" allowScriptAccess="sameDomain" type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/go/getflashplayer" />
	</object>
<!-- message submission form -->
  <form onSubmit="submitForm(); return false;" class="formPanel">
    <div class="sendTitle">Send a message:</div>
    <div class="formElements">
      <input id="user_message" type="text" size="70" />
      <input id="mex_button" type="submit" value="Send" />
    </div>
  </form>

<!-- JavaScript code specific of this application -->  
<script type="text/javascript">
  function submitForm() {
    var textField = document.getElementById("user_message");
    if (window.engineRef && textField) {
      var text = textField.value;
      textField.value = "";
      if (!text) {
        alert("Can't send an empty message");
      } else {
        var mex = "CHAT|" + text;
        engineRef.sendMessage(mex, "Chats", null, 5000);
      }
    }
  }

  //////////////// JavaScript code that extends some functions defined in misc.js

  // remember the current engine reference, if any
  var engineRef = null;

  // define an extension to the onEngineReady callback defined in misc.js
  function onEngineReady(lsEngine) {
    // store the engine reference
    engineRef = lsEngine;
  }
  // define an extension to the onEngineLost callback defined in misc.js
  function onEngineLost() {
    engineRef = null;
  }
  // these two functions are defined in misc.js
  var pushPage = initializeDemoPushPage("../commons/custom/", true, onEngineReady, onEngineLost);
  initializeDemoEngine(pushPage, "../commons/lightstreamer/", null);
  
//////////////// Flash Bridge Configuration
	var flashHandler = new FlashBridge("flashObject");

</script>

</body>

</html>
And the demoFlashChat.fla with 2 input text: text1 and statusField,with as code like:
Code:
import flash.external.ExternalInterface;
#include "..\lib\lsjavascriptbridge.as"

_root.text1.text = "";
_root.statusField.text = "WAITING";

function bridgeIsReady() {
	_root.statusField.text = "Bridge ready";
}

function statusChange(newStatus) {
	_root.statusField.text = newStatus;
}

function myOnStart() {
	_root.text1.text = "";
}
function myOnItemUpdate(itemPos,itemObj,itemName) {
	if (itemPos == 1) {
		if (itemObj.isValueChanged(1) == true) {
			_root.text1.text = itemObj.getNewValue(1);
		}
	}
}

var bridge = new JavaScriptBridge("flashObject");
bridge.onReady = bridgeIsReady;
bridge.onStatusChange = statusChange;
var myTable = new FlashTable("chat_room", null, "DISTINCT");
myTable.setDataAdapter("CHAT_ROOM");
myTable.setSnapshotRequired(true);

myTable.onItemUpdate = myOnItemUpdate;
myTable.onStart = myOnStart;
bridge.addTable(myTable,"FlashTable1");

bridge.bind();
2 above code file are combined from 2 your demo: ChatDemo and Flash_StockListDemo_Basic. But it can't run.I don't know. The problem maybe in callback function: myOnItemUpdate,because when I try put a code line as:_root.text1.text = "test" in this function(I'm so sorry, because now I only know debug like that in Flash), it don't display, but in your example(Flash_StockListDemo_Basic), a same line will display.
The above example only make a simple work: when user type a text line on HTML form, it transmit to LS server, then back to text1 variable in Flash, and display.
Thanks for your help!