Monitoring a file for changes from Java?

I note that the Toolbox has a FileListener interface, and the AS400File
class has an AddFileListener method.

I tried implementing the interface from my test class, and while I then
received a "FileOpened" event as soon as the test class opened the file,
that was about all I got. I was hoping to receive a "FileModified" event
when I updated a record from QuestView in another terminal session, but it
didn't get ANY events from actions taken elsewhere.

Am I doing something wrong, or do I just have unrealistically high
expectations?

The test class now looks like:
  import com.ibm.as400.access.*;
  class test03 implements FileListener {
     public static void main (String args[]) {
         System.out.println("I like spam!");
         AS400 as400 = new AS400("localhost");
         System.out.println("CCSID = " + as400.getCcsid());
         QSYSObjectPathName fileName = new
QSYSObjectPathName("AQUESTVIEW", "VIEWCUS", "FILE");
         System.out.println("Filename = " + fileName.getPath());
         SequentialFile file = new SequentialFile(as400, fileName.getPath());
         file.addFileListener(new test03());
         AS400FileRecordDescription recDes = new
AS400FileRecordDescription(as400, fileName.getPath());
         try {
             RecordFormat recFmt = recDes.retrieveRecordFormat()[0];
             System.out.println("Format = " + recFmt.getName());
             file.setRecordFormat(recFmt);
             file.open(SequentialFile.READ_ONLY, 1,
SequentialFile.COMMIT_LOCK_LEVEL_NONE);
             Record data = file.readNext();
             while (data != null) {
                 System.out.println((String) data.getField("CUNAME"));
                 data = file.readNext();
             }
             System.out.println("Going to sleep");
             try {Thread.sleep((long)60000);} catch(InterruptedException
ie) {System.out.println("Interrupted");}
             System.out.println("Waking up!");
             as400.disconnectAllServices();
         } catch (Exception e) {e.printStackTrace();}
     }

--
JHHL