Android AlarmManager不重复

我有以下问题：onCreate第一次执行警报管理器时，我在中注册了警报管理器。但是在我的延迟时间（1分钟）之后，应该再执行一次。但这是行不通的。为什么？

我的代码：

报警接收器

public class AlarmReceiver extends WakefulBroadcastReceiver {

private AlarmManager mAlarm;
private PendingIntent mAlarmIntent;

@Override
public void onReceive(Context context, Intent intent) {
    Intent service = new Intent(context, PortalPullService.class);

    String email = Helper.getEmail(context);
    String pw = Helper.getPw(context);
    service.putExtra("email", email);
    service.putExtra("pw", pw);

    startWakefulService(context, service);
}

public void setAlarm(Context context) {
    mAlarm = (AlarmManager) context.getSystemService(Context.ALARM_SERVICE);
    Intent intent = new Intent(context, AlarmReceiver.class);
    mAlarmIntent = PendingIntent.getBroadcast(context, 0, intent, 0);

    int interval = R.integer.update_interval_in_mins * 60 * 1000;

    mAlarm.setInexactRepeating(
            AlarmManager.ELAPSED_REALTIME_WAKEUP,
            interval,
            interval,
            mAlarmIntent);

    ComponentName reciever = new ComponentName(context, AlarmBootReceiver.class);
    PackageManager pm = context.getPackageManager();

    pm.setComponentEnabledSetting(reciever,
            PackageManager.COMPONENT_ENABLED_STATE_ENABLED,
            PackageManager.DONT_KILL_APP);
}

public void cancelAlarm(Context context) {
    if(mAlarm != null) {
        mAlarm.cancel(mAlarmIntent);
    }

    ComponentName reciever = new ComponentName(context, AlarmBootReceiver.class);
    PackageManager pm = context.getPackageManager();

    pm.setComponentEnabledSetting(reciever,
            PackageManager.COMPONENT_ENABLED_STATE_DISABLED,
            PackageManager.DONT_KILL_APP);
}
}

PullService

public class PortalPullService extends IntentService {

private static final String LOG_TAG = "PortalPullService";

public PortalPullService() {
    super(LOG_TAG);
}

@Override
protected void onHandleIntent(Intent intent) {


    //TODO make request to ** check if new Infos are available, then send notification
    Helper.sendNotification(this, "Test", "test"); /My test if this works

    AlarmReceiver.completeWakefulIntent(intent);
}

}

接收者通过注册 new AlarmReceiver().setAlarm(this);

我不知道我的错在哪里...

提前致谢 ;）