[xs400]

I could not get USBNETWORK to work on the DXG with 3.2.1
I used Launchpad instead.
Copy the deviceHack to the root of your Kindle DXG

create devhack.ini in the Launchpad folder with the following:

[Actions]
;; run devicehack runme
A A = !/mnt/us/deviceHack/runme

Press Shift Shift Space
Then press Shift A A

This worked for me

** I had to install certificates and install kindlet jailbreak again
** Also, did not have to use "runme install"

P.S. I'm a noob, and have no idea how the above worked, so you'll have to work it out if the above steps dont work for you.

Good luck!
OOPs! wrong thread but hope it helps anyway