EstimoteCloud Error EstimoteServerException 404 not found

Through my app I try to connect to my cloud but I always get this error message:

Com.sdk.estimote.exception.ServerEstimoteException: 404 Not Found

This is my code, what am I doing wrong?

public class MainActivity extends AppCompatActivity

protected void onCreate(Bundle savedInstanceState)


    EstimoteSDK.initialize(this, "XXXXXXX", "XXXXXXXXXXXX");
    // Configure verbose debug logging.

    //this is just to check if estimote initialized correctly
    MacAddress macAddress = MacAddress.fromString("EC:B1:43:8A:9F:5B");
    EstimoteCloud.getInstance().fetchBeaconDetails(macAddress, new CloudCallback<BeaconInfo>() {
        public void success(BeaconInfo beaconInfo) {
            Toast.makeText(MainActivity.this,"CONNECTION: " + beaconInfo.toString() ,Toast.LENGTH_LONG).show();

        public void failure(EstimoteServerException e) {
            Toast.makeText(MainActivity.this,"ERROR CONNECTION" + e ,Toast.LENGTH_LONG).show();