Windows Phone does not receive string from arduino bluetooth

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C#

Arduino

Bluetooth

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Hello. This is my scenario, i have an arduino uno and a hc-05 bluetooth module.
i use software serial for hc-05, this is my arduino code:
(from this link : http://stackoverflow.com/questions/18376468/arduino-using-serial-and-software-serial-with-bluetooth-module[^])

#include <SoftwareSerial.h>

#define rxPin 8
#define txPin 7

SoftwareSerial mySerial(rxPin, txPin); // RX, TX
char myChar ; 

void setup() {
  Serial.begin(9600);   
  Serial.println("Goodnight moon!");

  mySerial.begin(9600);
  mySerial.println("Hello, world?");
}

void loop(){
  while(mySerial.available()){
    myChar = mySerial.read();
    Serial.print(myChar);
    mySerial.print(myChar);
  }

  while(Serial.available()){
   myChar = Serial.read();
   mySerial.print(myChar);
  }
}

And i downloaded the app2device sample from msdn (link : https://code.msdn.microsoft.com/Bluetooth-app-to-device-644870ba[^])

I can connect my hc-05 bluetooth module, i see connected message box with host name. And when i send data to arduino hc-05, arduino receives it. I send the data with this method (link A Simple Bluetooth Application[^]) :

DataWriter dataWriter = new DataWriter(_socket.OutputStream);
               // send the message length first
               string message = "selammm";
               dataWriter.WriteInt32(message.Length);
               await dataWriter.StoreAsync();
               //send the actual message
               dataWriter.WriteString(message);
               await dataWriter.StoreAsync();

There is no problem here. But arduino should send this message back from bluetooth,
with SoftwareSerial with

mySerial.print(myChar);

But with this code from last codeproject link 'A Simple Bluetooth Application', windows phone does not receive anything.

DataReader dataReader = new DataReader(socket.InputStream);
await dataReader.LoadAsync(4);// get the size of message
uint messageLen =(uint)dataReader.ReadInt32();
await dataReader.loadAsync(messageLen)//send the message
String Message = dataReader.ReadString(messageLen); 

i set a breakpoint to datareader, and i see it stacked at

await dataReader.LoadAsync(4);

. no errors, but no messages.

You can see there is nothing special from me with this codes, i am a beginner, and from samples i want to make my own app (bluetooth connection between arduino and windows phone ), but i can't manage to get this working...

arduino wiring is here:

5v to hc-05 vcc
gnd to gnd
hc-05 tx to pin 8
hc-05 rx with 1k resistor to pin7 and 2k resistor to gnd

i also copied this from a site http://www.instructables.com/id/Cheap-2-Way-Bluetooth-Connection-Between-Arduino-a/[^]

my arduino wiring is this except the rx,tx. i use 7,8 instead of 0,1 and software serial.

I will be really happy if someone helps me on this.
Thanks from now.