Invalid Launch Image - Your app contains a launch image with a size modifier that is only supported

I'm using the latest Adobe AIR and SDK, 3.5. The app works on my iPhone 5 and shows the loading screen, but when making a app store version and uploading it I get this:

Dear developer,

We have discovered one or more issues with your recent delivery for "Eat Sleep Skate". To process your delivery, the following issues must be corrected:

Invalid Launch Image - Your app contains a launch image with a size modifier that is only supported for apps built with the iOS 6.0 SDK or later.

Once these issues have been corrected, go to the Version Details page and click "Ready to Upload Binary." Continue through the submission process until the app status is "Waiting for Upload." You can then deliver the corrected binary.

So it's complaining on my Default-568h@2x.png I think. If I remove it it might accept the file, but I really want a loading screen. So, how can I fix this? I only find solutions for xcode developers