The Eye of Judgment: Legends

[ThatNamelessGuy]

Hi everyone,
I'm trying to use the ad-hoc mode within the game "Eye of Judgment Legends" with no luck so far.

This is the message I get when any side tries to join the other's waiting room:
-"Connection error! Check network connection."

This is what I tried:
-Latest version of PPSSPP + Hamachi + AdhocServerProOnline
-Latest version of Orphis build + Coldbird Server

I tested both methods with Tekken 6 and they work just fine, so idk what the problem could be.
Has anyone found a workaround with this game? or has had similar problems with other games?

Any help will be appreciated!