Не отображается Google map!

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="ru.startandroid.demogooglemapsv2"
    android:versionCode="1"
    android:versionName="1.0" >
    
     <uses-sdk
        android:minSdkVersion="8"
        android:targetSdkVersion="17" />
    
    <permission 
        android:name="ru.startandroid.demogooglemapsv2.permission.MAPS_RECEIVE"
        android:protectionLevel="signature"/>
          
    <uses-permission android:name="ru.startandroid.demogooglemapsv2.permission.MAPS_RECEIVE"/>
    
    <uses-permission android:name="android.permission.INTERNET"/>
    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
    <uses-permission android:name="com.google.android.providers.gsf.permission.READ_GSERVICES"/>
    <!-- The following two permissions are not required to use
         Google Maps Android API v2, but are recommended. -->
    <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/>
    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
 
    <uses-feature
        android:glEsVersion="0x00020000"
        android:required="true"/>
    
    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
          
    <meta-data
        android:name="com.google.android.maps.v2.API_KEY"
        android:value="AIzaSyDlmWYU8S-B7ehKQHi-djVjjS_BDkReyyo"/>
        
    <uses-library
         android:name="com.google.android.maps" />
  
        <activity
            android:name="ru.startandroid.demogooglemapsv2.MainActivity"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
 
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>
    
</manifest>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical" >
    
    <fragment
        android:id="@+id/map"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        class="com.google.android.gms.maps.MapFragment"/>
 
</LinearLayout>

<uses-feature
        android:glEsVersion="0x00020000"
        android:required="false"/>