WP7/WP8 Adding Reference error - A reference to a higher version or incompatible assembly cannot

[DYY]

Hi all, I am getting the following error when trying to add the AdMob SDK reference to my projects;

Is anyone else experiencing this issue with windows phone apps?  

[radoslaw....@gmail.com]

Hello,

You must go to folder (ex. in File Explorer) where you downloaded the SDK. Left-click on it, properties, and click button Unblock. That will help you.