Repeating voice over after unloaded from loader.

Dear Friends,

iam creating an elearning app using AirforIOS. iam loading a file with more subfiles (5 or more swf - directly from internet). its working fine, when I load another lesson off line locally from appstorage location, previous lessons last file vo is still reading. Even I have removed all the files before loading another lesson or logout the previous lesson. In computer its running fine. When I install my app in tab its keep repeating the previously loaded file. Pls help me to solve this issue.

iam using following code pls check:

private function loadLMSFrame() {

   var filePath = "assets/frame.swf" + "?tt=" + Math.random();

   while (lessonLoader.numChildren > 0) {

    lessonLoader.removeChildAt(0);

   }

   ldr = null;

   ldr = new Loader();

  ldr.unloadAndStop();

   req = new URLRequest(filePath);

   req.cacheResponse = false;

   req.useCache = false;

   ldr.load(req, lc);

   ldr.contentLoaderInfo.addEventListener(IOErrorEvent.IO_ERROR, lmsframeLoadCompletedIOError);

   ldr.contentLoaderInfo.addEventListener(ProgressEvent.PROGRESS, lmsframeLoadCompletedProgress);

   ldr.contentLoaderInfo.addEventListener(Event.COMPLETE, lmsframeLoadCompleted);

  }

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public function loadLessonData() {
   mainPath = root.loaderInfo.url;

   if (LMSMain.onlineMode) {
    storagePath = LMSMain.internetlocation;
   } else {
    storagePath = "app-storage:/";
   }

  }

Thanks and in advance.

Regards,

Syed Abdul Rahim