Hi Michael, Thank you for your post. Stage3D is supported in Air apps in Kindle fire. The number of available Stage3D objects depends on the platform and on the available hardware. And we have tested that stage.stage3D is accessible from Kindle 1st, 2nd Gen and HD. Can you please let us know which version of Kindle Fire you are using? You can raise a ContactUs (
https://developer.amazon.com/help/contactus.html) for this with the detail of the error and one of our support engineer will help you shortly. Thank you.