I'm not sure why this problem is popping up now since I've used ads with the Microsoft Pubcenter before, but now anytime I try to compile a Windows Phone project using ads, I get these errors:
Error 1 The type or namespace name 'Advertising' does not exist in the namespace 'Microsoft' (are you missing an assembly reference?)
Error 2 The type or namespace name 'Advertising' does not exist in the namespace 'Microsoft' (are you missing an assembly reference?)
Error 3 The type or namespace name 'AdGameComponent' could not be found (are you missing a using directive or an assembly reference?)
Error 4 The type or namespace name 'DrawableAd' could not be found (are you missing a using directive or an assembly reference?)
Any ideas on what could be wrong?