AdMob for Windows Phone 8 FailedToReceiveAd NetworkError -

AdMob for Windows Phone 8 FailedToReceiveAd NetworkError -

i need add together admob banner app. grab failedtoreceivead event networkerror message on emulator , on device. illustration official site behave same way. webbrowser , other network tasks work network good.

plese help, because can't find solutions of proplem.

select mandatory , optional capabilities app. can modify app's capabilities opening wmappmanifest.xml , selecting capabilities tab. check adrequest.forcetesting = true; must false

windows-phone-8 admob