When i keep my placement id Blank I mean I kept it default Code (CSharp): this.adView = new AdView("YOUR_PLACEMENT_ID", AdSize.BANNER_HEIGHT_50); then it shows the add perfectly for all types. but when i put my placement id then it shows me fill error. After putting my placement my code looks like. Code (CSharp): this.adView = new AdView("12345677_988776786", AdSize.BANNER_HEIGHT_50); I am testing this with their samples. I am also getting an error in the logcat something like this "You dont call AudiencenetworkAds.Initialize(), for this Fan may not work properly". but this dont effect the add loading when i keep the placement to "YOUR_PLACEMENT_ID". When I tried to initialize this i can't find anything like that Looking for a solution. NB: I have facebook app installed, My FAN project is approved by facebook, I have put the project on Test and Live mode for testing, I tested in emulator and also real divices with different facebook id logged in and also the test Id logged in.