Problem Unable to connect in making Kindle DXG as extended monitor

Hi all,

I am trying to make my kindle DXG as the 2nd e-ink monitor of my windows laptop by following links
http://www.pcworld.com/article/25958...c_display.html
https://tinyapps.org/docs/e-ink-monitor.html

I installed usbNetwork on DXG and use debug/netWorrk command to make it as ethernet in the windows network and set it IP to 192.168.2.1 with mask 255.255.255.0.
Then use SSH putty to connect to it with IP 192.168.2.2. Everything works fine.

I used VNC server 5.0 on my windows 10. because this computer is in another network, so in the VNC information popup window it dsiplays 'VNC Viewer users can connect using the address 10.130.65.54:1

Users with a Java-enabled web browser can navigate to http://10.130.65.54:5801'.

Then I added route in windows(not sure this is correct):
C:\Windows\system32>route -p add 10.130.64.0 mask 255.255.240.0 192.168.2.1 metric 1

And for DXG in putty: input following command(not sure it is correct)
route add default gw 192.168.2.1
/etc/init.d/netwatchd stop
/etc/init.d/powerd stop
/mnt/us/kindlevncviewer/kvncviewer.sh -password 123 192.168.2.1:5901 &
And I got messages returned:
not able to set parameter for screensaver <= not sure this matters or not, I guess it does not matter, it is only for setting screensaver to off.
Unable to connect to VNC server <= this is my question, I am not sure is there any wrong network configuration during the above step which lead to this disconnection. or does it have anything to do with my windows farewall? shall I switch of? I do not find any information in firewall logs.
Is there any stetement in putty I can use to check the reason for unable to connect?
thanks in advance!

Cain