AdWhirl does not show AdMob ads

I included AdWhirl in my project, and now I want to display only Admob.
But only one ad is shown ... no other ads arrive .... LogCat updates the advertisement after 30 seconds, but they do not appear on the screen.
I use the same encoding as on the official AdWhirl website.
Please tell me how I can do this ... It is very urgent for me.

  <LinearLayout
    android:id="@+id/layout_main"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:layout_marginBottom="5dp"
    android:orientation="vertical" >

    <TextView
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="" />

    <com.adwhirl.AdWhirlLayout
        android:id="@+id/adwhirl_layout"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content" />
</LinearLayout> 

And this is in my main class:

    try
    {
        AdWhirlManager.setConfigExpireTimeout(1000 * 60 * 5);

        AdWhirlTargeting.setAge(23);
 //         AdWhirlTargeting.setGender(AdWhirlTargeting.Gender.MALE);
  //            AdWhirlTargeting.setKeywords("online games gaming");
 //         AdWhirlTargeting.setPostalCode("94123");
        AdWhirlTargeting.setTestMode(false);

        AdWhirlLayout adWhirlLayout = (AdWhirlLayout) findViewById(R.id.adwhirl_layout);
//          TextView textView = new TextView(this);

        RelativeLayout.LayoutParams layoutParams = new RelativeLayout.LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT);

        int diWidth = 320;
        int diHeight = 52;
        int density = (int) getResources().getDisplayMetrics().density;

        adWhirlLayout.setAdWhirlInterface(this);
        adWhirlLayout.setMaxWidth((int) (diWidth * density));
        adWhirlLayout.setMaxHeight((int) (diHeight * density));

        layoutParams.addRule(RelativeLayout.CENTER_HORIZONTAL);
//          textView.setText("");

        LinearLayout layout = (LinearLayout) findViewById(R.id.layout_main);
        layout.setGravity(Gravity.CENTER_HORIZONTAL);
        layout.addView(adWhirlLayout, layoutParams);
//          layout.addView(textView, layoutParams);
//          layout.invalidate();
    }
    catch (Exception e)
    {
        Log.e("error", e.toString());
    }    

EDIT:
I forgot to add to the question earlier.
This is my manifest.xml file

<meta-data
        android:name="ADWHIRL_KEY"
        android:value="My_KEY" />