android - Failed to load ad (Error 1) -

have been searching hours on google, still without success. error message , adbanner doesnt load:

there problem getting ad response. errorcode: 1 failed load ad: 1 

build.gradle

compile 'com.android.support:appcompat-v7:24.0.0' compile 'com.google.android.gms:play-services-ads:9.4.0' 

android manifest

<activity         android:name="com.google.android.gms.ads.adactivity"         android:configchanges="keyboard|keyboardhidden|orientation|screenlayout|uimode|screensize|smallestscreensize"         android:theme="@android:style/theme.translucent"         /> 

layout

<com.google.android.gms.ads.adview     android:id="@+id/adview"     android:layout_width="match_parent"     android:layout_height="wrap_content"     ads:adsize="banner"     android:layout_margintop="20dip"     ads:adunitid="pub-*****************"     android:layout_below="@+id/middle"     android:layout_alignparentright="true"     android:layout_alignparentend="true" /> 

activity (imports)

import com.google.android.gms.ads.adrequest; import com.google.android.gms.ads.adview; 

activity

adview adview = (adview)findviewbyid(r.id.adview);      adrequest adrequest = new adrequest.builder().build();     adview.loadad(adrequest); 

permissions added

ty in advance

the error code 1 refers invalid request.

//(public static final int error_code_invalid_request ad request invalid; instance, ad unit id incorrect. constant value: 1) //

thus must check whether ad-ids defined @ right place. don't put banner ads id interestial ads , vice versa. other error codes take on link: https://developers.google.com/android/reference/com/google/android/gms/ads/adrequest#error_code_no_fill