AdWords API Adding Placements using Live API V13

Hello, I now ran the application on Google AdWords LIVE API V13 and faced a scenario explained below. Is it a valid scenario? I created a Keyword Campaign and then an AdGroup to it using LIVE API. Now I tried to add a placement to the AdGroup, I face the same error as mentioned previously in the

AdWords API Saving Placements in sandbox

Hello All, I am using the Google AdWords API V13 Sandbox. I created a campaign with network type as Google network and Content network. The content targeting is set to SelectedPlacements which gets changed to AllPlacement in the object returned by the Sandbox API. I created an AdGroup for the sa