Failed to find provider info for com.google.android.gsf.gservices - api

Question

I don't know why Wen run the android app i'm developing, when i want to show maps i obtain an acivity blank with only zoom buttons and the log is:
Failed to find provider info for com.google.android.gsf.gservices
This is the activity that show the map
<?xml version="1.0" encoding="utf-8"?>
<fragment xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/map"
android:layout_width="match_parent"
android:layout_height="match_parent"
class="com.google.android.gms.maps.SupportMapFragment"/>
This is the file manifest:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="md.clt.android"
android:versionCode="1"
android:versionName="1.0" >
<permission
android:name="md.client.android.permission.MAPS_RECEIVE"
android:protectionLevel="signature" />
<uses-permission android:name="md.client.android.permission.MAPS_RECEIVE" />
<uses-sdk
android:minSdkVersion="9"
android:targetSdkVersion="16" />
<uses-permission android:name="android.permission.INTERNET" />
<!-- Allows the API to access Google web-based services -->
<uses-permission android:name="com.google.android.providers.gsf.permission.READ_GSERVICES" />
<!-- Allows the API to cache map tile data in the device's external storage area -->
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_MOCK_LOCATION" />
<!-- Google Maps Android API requires OpenGL ES version 2 -->
<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="My_apy_key" />
<activity
android:name="md.clt.android.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>
<activity
android:name="md.clt.android.PoiMap"
android:label="#string/title_activity_poi_map" >
</activity>
<activity
android:name="md.clt.android.PoiListActivity"
android:label="#string/title_activity_poi_list" >
</activity>
</application>
</manifest>
What it means?