Android : Use debug API key over ADB with eclipse

I'm trying to use Google Maps in my App. I created an debug certificate which is saved in debug.keystore. I registered it at code.google.com (with correct project package) and copied the api key to the android manifest. I have all needed Permissions, i use

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

and i have

<meta-data android:name="com.google.android.gms.version"
        android:value="@integer/google_play_services_version" />

I still get an error when i install the app on my device with ADB (using the eclipse android plugin and the start button). How can i fix that (i checked the certificate and the api key already multiple times)?