Have you made sure that your Kindle Fire has been updated - Amazon update page here.
Have you tried resetting the Kindle - press and hold the start button for 20 seconds then release it. It should re-start. Wait 5 minutes and try to connect again.
Surface Pro (2017) vs Surface Pro 4
Where HTML5 is headed next
MacBook Pro v Surface Pro 5
Synology invites you to visit them at Insomnia on 26th – 29th August. Book your tickets now and visit Synology.