WriteLine() Does not seem to work for me.

function GetArcadeMenuNames_Scores()
{
// Reading Names and displaying in console
 %ArcadeNames = new FileObject();
 %ArcadeNames.openForRead("scriptsAndAssets/data/missions/Arcade_Names.txt");
 
 %lineCount1 = 0;
 while ( !%ArcadeNames.isEOF() ) 
  {
   %line1 = %ArcadeNames.readLine();
   echo(%line1);
   %lineCount1++;
  }
  %ArcadeNames.close();

// Reading Scores and displaying in console

   %ArcadeScores = new FileObject();
   %ArcadeScores.openForRead("scriptsAndAssets/data/missions/Arcade_Scores.txt");
    
   %lineCount2 = 0;
   
    while ( !%ArcadeScores.isEOF() ) 
     {
      %line2 = %ArcadeScores.readLine();
      echo(%line2);
      %lineCount2++;
     }
    %ArcadeScores.close();


// Trying to write to a file

%Writing_TestingWrite = new FileObject();
  	
        if(%Writing_TestingWrite.openForAppend("./scriptsAndAssets/data/missions/TestingWrite.txt"))
        {
  	%Writing_TestingWrite.writeLine("Happily Writing Text");
  	 echo("We should be writing to file: Happily Writing Text");
  	%Writing_TestingWrite.close();
        } 
        
        else
        {
         echo("Error in opening file... Does it exist?");
        }
        
       


            %Reading_TestingWrite = new FileObject();
            %Reading_TestingWrite.openForRead("scriptsAndAssets/data/missions/TestingWrite.txt");
            
            %lineCount3 = 0;
            
            while ( !%Reading_TestingWrite.isEOF() ) 
             {
              %line3 = %Reading_TestingWrite.readLine();
              echo("TestingWrite "@ %line3);
              %lineCount3++;
             }
             
              %Reading_TestingWrite.close();
  
}