You have to install only 5.6.1.1. as TLS or SSL whatever certs they are, are needed by the Kindle.

BTW, why do you want to such a low version like 5.3.9. Kindle Downgrades are not that easy as you might think and take it to be.

Seems like you have to JB up again.

: Anyways, did you press the never touch button (aka reset button). JB it again, with the latest software jailbreak and then it will work. Then, you can use KUAL as desired.