Android Question BLE manager.ReadData2( Service,Characteristic ) doesn't read new data after first time?

    /**
      * MY added - function to purge characteristic cache  so it will reload on ReadData()
      */
    public void    zapCache(String DeviceId){
        charsToReadQueue.clear();
               }

/**
     * Asynchronously reads all characteristics from the given service. The DataAvailable will be raised when the data is available.
     */
    public void ReadData(String Service) {
        ReadData2(Service, null);
    }
    /**
     * Asynchronously reads the value of the specified characteristic.
     *The DataAvailable will be raised when the data of this characteristic is available.
     */
    public void ReadData2(String Service, String Characteristic) {
        synchronized (charsToReadQueue) {
            boolean queueWasEmpty = charsToReadQueue.isEmpty();
            boolean atLeastOneReadable = false;
            BluetoothGattService ser = getService(Service);
            for (BluetoothGattCharacteristic chr : readableCharsFromService(ser)) {
                if (Characteristic == null || chr.getUuid().toString().equals(Characteristic)) {
                    charsToReadQueue.add(chr);       
                    atLeastOneReadable = true;
                }
            }
            if (atLeastOneReadable) {
                if (queueWasEmpty){
/*                    gatt.readCharacteristic(charsToReadQueue.get(0));
*/
                    Map data = new Map();
                    data.Initialize();
                    for (BluetoothGattCharacteristic chr : ser.getCharacteristics()) {
                        String uuid = chr.getUuid().toString();
                        data.Put(uuid, new byte[0]);
                    }
                    ba.raiseEventFromDifferentThread(BleManagerMY.this, null, 0, eventName + "_dataavailable", false,
                            new Object[] {Service, data});
                }
            }
            else {
                if (Characteristic == null) {
                    Map data = new Map();
                    data.Initialize();
                    for (BluetoothGattCharacteristic chr : ser.getCharacteristics()) {
                        String uuid = chr.getUuid().toString();
                        data.Put(uuid, new byte[0]);
                    }
                    ba.raiseEventFromDifferentThread(BleManagerMY.this, null, 0, eventName + "_dataavailable", false,
                            new Object[] {Service, data});
                }
                else {
                    BA.LogInfo("No matching characteristic found.");
                }
            }

        }
    }

import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.lang.reflect.Type;

public void zapCache(String deviceId) throws Exception {
    BluetoothDevice device = this.devices.get(deviceId);
    Class<?> clazz = Class.forName("android.bluetooth.BluetoothGatt");
    Method[] allMethods = clazz.getDeclaredMethods();
        for (Method m : allMethods) {           /* for loop is extra for  */
        String mname = m.getName();             /* debug print of GaTT    */
        out.format("GATT has: %s()%n", mname);  /*  functions as a check? */
        };
    Method method = clazz.getDeclaredMethod("refresh", BluetoothGatt.class);
    method.setAccessible(true);   /* SDK hids the function, so we make it runabable */
    method.invoke(gatt, device);  /* off to the gatt.refresh(device), ignore return */
}