CDATA error

Question

In Flash Builder, I'm getting this problem:
"invalid character or markup found in script block.  Try surrounding your code with a CDATA block".
Tho in fact, my code is already surrounded with a CDATA block, and the syntax is correct. What is the problem here? 
<?xml version="1.0" encoding="utf-8"?>
<s:Application xmlns:fx="http://ns.adobe.com/mxml/2009"
                  xmlns:s="library://ns.adobe.com/flex/spark"
                  xmlns:mx="library://ns.adobe.com/flex/mx"
                  implements="com.rfm.interfaces.IExercise"
                  xmlns:assets="com.rfm.assets.*"
                  xmlns:tapat="com.bpi.tapat.*"
                  width="800" height="600">
     <fx:Script>
     <![CDATA[
          import TPController;
          import TPModel;
          import TPViewer;
          import com.rfm.assets.AssetContainerMgr;
          import com.rfm.events.ExerciseEvent;
          import com.rfm.interfaces.IExercise;
          import com.rfm.state.GameState;
          import com.rfm.state.TaskModel;
          import com.rfm.test.TestInterface;
          import flash.events.*;
          import mx.controls.Alert;
          import mx.core.UIComponent;
          private var _spec:Object;
          public var startupAssets:Array = ['tapat_assets', 'global_assets'];    
          public function startup(spec:Object, previousstate:Object):Boolean {
               GameState.fromJSON(previousstate);
               TestInterface.instance.register_object(this, 'currentExercise');
               _spec = spec as TaskModel;
               ldrview.load(startupAssets);
               return true;
          public function kill():Boolean{
               return true;
          public function status():Object{
               return GameState.toJSON();
          public function pause():void{trace("pause");}
          public function resume():void{trace("resume");}
          public function easyConfig():void{trace("easyConfig");}
          public function mediumConfig():void{trace("mediumConfig");}
          public function hardConfig():void{trace("hardConfig");}
          public function easyStimulus():void{trace("easyStimulus");}
          public function mediumStimulus():void{trace("mediumStimulus");}
          public function hardStimulus():void{trace("hardStimulus");}
          public function prePrompt():void{
               currentState = 'stimulus';
               init();
          public function prompt(e):void{    
               GameState.write('did_tut', true);
               currentState = 'prompt';
          public function nextTrial():void{
               currentState = 'stimulus';
          public function trialComplete(correct:Boolean):void{
               AssetContainerMgr.playMP3(correct?'ding':'thump')
               prompt();
          private function finished():void{
               dispatchEvent(new ExerciseEvent(ExerciseEvent.FINISHED, {}))
          private function problem():void{
               dispatchEvent(new ExerciseEvent(ExerciseEvent.ERROR, {message: 'happy fun error'}))
          private function init():void{
               var container:UIComponent = new UIComponent;
               var TPM:TPModel = new TPModel();
               var TPV:TPViewer = new TPViewer();
               var TPC:TPController = new TPController();
     ]]>
     </fx:Script>
     <s:states>
          <s:State name="loading"/>
          <s:State name="prompt"/>
          <s:State name="stimulus"/>
     </s:states>
     <assets:AssetLoaderUI id="ldrview" done="prePrompt()" includeIn="loading"/>
     <tapat:TAPATSkin id="bg" excludeFrom="loading"/>
     <fx:Declarations>
          <tapat:colorfilters id="colorfilters"/>
     </fx:Declarations>
     <s:Button label="skip" click="finished()" skinClass="com.rfm.skins.TxtBtn"/>
</s:Application>

Answer 1

You have a bracket missing or a bad character somewhere. Im not going to dig it out for you.
I would suggest removing all the code and pasting it back in, piece by piece. That will help you figure out where the bad syntax/character is.
I noticed this too:
AssetContainerMgr.playMP3(correct?'ding':'thump')
^ not sure if you need a semicolon at the end there???