bing translator for android

hi :

i am using bing translator api for android , but i got this error :

error retrieving translation : null  , i am only get the client id and client secret but i am not get access token here is my simple code :

package com.example.test;

import com.memetix.mst.language.Language;
import com.memetix.mst.translate.Translate;
import android.app.Activity;
import android.os.Bundle;
import android.util.Log;
import android.widget.TextView;
public class MainActivity extends Activity {
@Override
public void onCreate(Bundle savedInstanceState)

{
    Translate.setClientId("GP_Translator");
    Translate.setClientSecret("+g/5jZTtVwz+9/+t21byqp02JCxwEEOjz+/d1CpSGdo=");
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
 
    TextView t = (TextView)findViewById(R.id.TextView01);

    t=(TextView)findViewById(R.id.TextView01); 
   
    try {
        String translatedText = Translate.execute("life", Language.ENGLISH, Language.FRENCH);
        t.setText(translatedText);
        System.out.println("hello try");
       Log.d("LOG", translatedText);
      
    } catch (Exception e) {
     System.out.println("here catch"); 
     t.setText("sorry");
        e.printStackTrace();
        
    }
}
}

 thanks