当月Facebook好友生日的安卓

我在写一个应用程序中，我获取列表的 Facebook好友使用的 Hackbook样品code 的，但现在我想获取的 Facebook的列表朋友的生日当月，让所有我用这code友列表：

I am writing an app in which i am fetching list of Facebook Friends using Hackbook Sample Code but now i want to fetch list of Facebook Friends those birthdays in Current Month, to get list of all Friends i am using this code:

 public static void requestFriends(FacebookRequest facebookRequest) {
    Log.d(LOG_TAG, "requestFriends(" + ")");
    String query = "select name, birthday, uid, pic_square from user where uid in (select uid2 from friend where uid1=me()) order by birthday_date";
    Bundle params = new Bundle();
    params.putString("method", "fql.query");
    params.putString("query", query);
    FacebookUtility.asyncRunner.request(null, params, new FacebookRequestListener(FacebookRequestListener.FRIENDS, facebookRequest));
}

不过我用下面code拿到名单的朋友当月的生日的：

 Calendar c = Calendar.getInstance(); 
    int month = c.get(Calendar.MONTH)+ 1;

    String query = "select name, birthday, uid, pic_square from user where uid in " +
    "(select uid2 from friend where uid1=me())AND birthday_date >= '" + month + "/01' AND birthday_date <= '" + month + "/31' ORDER BY birthday_date ASC";

但我没有得到任何记录，我在哪里丢失的？

but i am not getting any record, where i am missing ?