Kindle fire hd 8.9 hard-bricked topic

I rooted my kindle and installed a 2nd bootloader and TWRP it worked fine for a few days but then i decided to upgrade my TWRP and i some how corrupted my bootloader and now my kindle is stuck on the boot screen which shows the logo Kindle in White and Fire in Orange it does not go ahead. My pc does not even detect my kindle so I read this thread

http://forum.xda-developers.com/show....php?t=1869297

but i am not able to solve this problem.

It does not go into fastboot.
I tried to upgrade from TWRP 2.6.0.0 to 2.8
I think the problem was that i did not install FireFireFire in my kindle :p
I used usb 3.0 to do all of this.

Please Help