TypeError: Error #1010: a term is undefined -> Error is thrown only if application is online

Hi everybody,

I have strange error which i tried to fix all day but with no result. The application is working fine in debug modus, but after I uploaded it to my server it throws following Error:

TypeError: Error #1010: Ein Begriff ist nicht definiert und hat keine Eigenschaften. (A term is undefined and has no properties.)

at controller.objects::LevelMap/getCurrentXPosition()

at screens::MainMenu/showMap()

at screens::MainMenu/__PlayzoneScreen_showMapEvent()

at flash.events::EventDispatcher/dispatchEventFunction()

at flash.events::EventDispatcher/dispatchEvent()

at mx.core::UIComponent/dispatchEvent()

at screens::Playzone/showMap()

at screens::Playzone/__mapButton_mouseOver()

This error is thrown ( I guess ) at this point:

Object

public class LevelMap

{

     //holds the current level positions (ID) for the map in an two-dimensional array (X / Y coordinates)

     //Index = SceneID-1 -> [ '[X SceneID=1][Y SceneID=1]', '[X SceneID=2][Y SceneID=2]' ... ]

     private var _mapXYArray:Array;

     public function LevelMap(mapXML:XMLList):void

     {

          this._mapXYArray = new Array();

          for(var i:int = 1;  i <= mapXML.position.length(); i++){

               var x:int = mapXML.position.(@id==i).x;

               var y:int = mapXML.position.(@id==i).y;

               this._mapXYArray.push(new Array(x,y));

          }

     }

     public function getCurrentXPosition(currentSceneID:int):int{   

          currentSceneID--;

          return _mapXYArray[currentSceneID][0];    //Point of Error?!

         }

     (...)

}

This Object-Method is used in the Main class with following code:

private var levelMap:LevelMap;

private function showMap(event:ShowMapEvent):void{

     if(MapScreen.visible){

          (...)

     }

     else{

          MapScreen.visible = true;

          var x:int = levelMap.getCurrentXPosition(game.nextSceneID);   //call of getCurrentXPosition()

          var y:int = levelMap.getCurrentYPosition(game.nextSceneID);

          MapScreen.setCurrentPosition(x,y);

     }

}

XML File

(...)

<levelmap source="pictures/TRE01Map.jpg">

    <position id="1"><x>70</x><y>31</y></position>

    <position id="2"><x>55</x><y>12</y></position>

     (...)

This methods are used to show on a map where the player is at the moment. It is using X/Y coordinates, which are parsed from a XML file. This works fine! The showMap()-function calls the object to get the coordinates with the get CurrentXPosition with an ID from the current scene.

I really don't understand, why this works fine in Adobe Flash Builder, but not after I export it to a release build. XML-Files seems to be right.

If anybody has any ideas, why this could happen, please feel free to answer!

Thanks,

Kris