I thought the ads were not there but they were there, you can't see them unless you use the test codes (you can find the codes and read about it here: (I cant place full urls) msdn.microsoft.com/en-us/library/advertising-windows-test-mode-values%28v=msads.10%29.aspx
It seems quite simple but it took me a while to find out this was the problem, so I hope this post helps others and saves them time!