Air iOS - How to add iPhone 6 icons to app.xml?

I'm using Flash CS6 and Air 3.9 to publish an iOS app.

How to add the icons for iPhone 6 and iPhone 6 Plus to the app.xml?

I tried this but got an error:

<icon><!-- all other icon sizes --><image120x120>AppIcons/app_120.png</image120x120><image180x180>AppIcons/app_180.png</image180x180></icon> 

Any help appreciated.

Thanks