Hey there, I cant seem to port forward with the Deco x80. 

Current Set up: A Cable from Modem to the Deco x80 (Router) and From there I connect A cable between the Deco to a 24 port Gigabit Easy Smart Switch (TL-SG1024DE) which for all of the LAN used in different floor (As well as my pc), So it might look something like this; 

And I have gone to the deco settings, NAT Forwarding, Add the rules, inclueding Internal IP ( which i select "Use Client Ip Address" and Choose my PC that I wants to portforward) it automatic detects my computer IP and all, which i checked it is the correct IP from my PC)  that I am using for creating a pal world server. ;

But i still cant seem to port forward sucussfully as I check on my pc the port was not open.  Is there any steps I miss to port forward or using a deco as router will face diffculty of port forwarding (As i saw some of the threads people were facing issues port forwarding with deco as well). I've also try using their solution to port forward but it is still not working