AdWhirl未显示AdMob广告

Question

我已经在我的项目中集成了AdWhirl,我现在只想显示Admob.
但是只显示了一个广告...没有其他广告即将推出....在LogCat中,它是30秒后的刷新广告,但它们不会显示在屏幕上.
我使用与AdWhirl官方网站相同的编码.
请告诉我如何做到这一点......我非常迫切需要它.

  <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> 

这是我的主要课程:

    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());
    }    

编辑:
我之前忘记添加问题.
这是我的manifest.xml文件

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