Android 4.4 после перегрузки не подключается к Wifi?

WifiConfiguration conf = new WifiConfiguration();
                conf.SSID = "\"" + "some_ssid" + "\"";
                conf.preSharedKey = "\"" + "some_password" + "\"";

                int netID = wifiManager.addNetwork(conf);
                wifiManager.disconnect();
                wifiManager.enableNetwork(netID, true);
                wifiManager.reconnect();