Flash CC and google display network clickTAG

I have been trying to add a clickTAG to my advert files in Flash CC. Seems to work fine but google is rejecting the adverts as an 'unsupported format'. It appears that Google will only accept SWF files up to 10.1 and the lowest you can export in CC is 10.3. I have downloaded 10.1 encoder and added it to the program XML files but still not accepting. My last hope was to open in CS5 or CS6 and that should work but I can't seem to be able to backsave or I don't know how. Any advice on this? The clickTAG I am using is below:

btn.addEventListener(MouseEvent.MOUSE_DOWN, onClick);

function onClick(e:MouseEvent):void {

          var click_url:String = root.loaderInfo.parameters.clickTAG;

          navigateToURL(new URLRequest(click_url), '_blank');

}