I am trying following code to find bluetooth printers. The code runs fine on API 4 however it does not run on API 6. It starts looking for the bluetooth printers but did not go to any callbacks or neither throw any error.  I am using ZSDK_API 2.9.2275.jar. Please let me know what I am doing wrong. Thanks in advance. 
 
private void lookForPrinters() {
  @Override
   public void run() {
   try {
  BluetoothDiscoverer.findPrinters(MainActivity.this, new DiscoveryHandler() {
  @Override
   public void foundPrinter(DiscoveredPrinter discoveredPrinter) {
  DiscoveredPrinterBluetooth discoveredPrinterBluetooth = (DiscoveredPrinterBluetooth) discoveredPrinter;
   if  (discoveredPrinterBluetooth.friendlyName != null && discoveredPrinterBluetooth.friendlyName.startsWith("XXXX")) {   Log.i(TAG, "Discovered a printer"  + discoveredPrinterBluetooth.friendlyName);
  }
  }
@Override
   public void discoveryFinished() {
  Log.i(TAG, "Discovery finished");
  }
@Override
   public void discoveryError(String s) {
  Log.i(TAG, "Discovery error");
  }
  });
  }
   catch (ConnectionException e) {
  Log.i(TAG , e.getMessage());
  }
 
  }
  });
  }