That is not the jailbreak, that is a continuation of the Frankenstein firmware for the K2/DX(G).
I don't think anyone has (successfully) used VNC on a device with Doukan installed.
We don't support the Doukan project here due to issues with their ethics.
You might want:
https://www.mobileread.com/forums/sho...d.php?t=150434
or
https://www.mobileread.com/forums/sho...d.php?t=174018
or one of the other 17 threads here on that topic.
Now that you are a member here, searching has changed (for members logged in).
See #6:
https://www.mobileread.com/forums/sho...d.php?t=237083
Known locally as: AITT (Answers I am Tired of Typing).