This not reading folders in the Windows Store

My script does not work in Windows Store, but running inside the Unity it works. PS: Sorry my english

 static var CaminhoAux :String= Application.dataPath+"/LastSurvivor";
 function LerPastas(){
     LinhasInf = Directory.GetDirectories(CaminhoAux+"/");
     Linhas = new String[LinhasInf.Length];
 
     for (i = 0; i < LinhasInf.Length; i++){
         Linhas[i] = Path.GetFileName(LinhasInf[i]);
     }
     
 } 
    
 
 function Update(){
     if(Salvos){
         LerPastas();
     }
 
 }