NAT is strict on my wifi adapter, but not on wired connection

[HeroRT]

NAT is open, but only when I use ethernet cable.
I had to buy Wifi-adapter since my room mate does not want the wire in his room (router is in his room)
I bought this: D-Link DWA-182
And when I try to play games with it says that NAT is strict, when it should open... What can I do?

 

[little_me]

Your room mate would need to disable NAT from his router.
Reason is, said router is likely applying NAT on all wireless device connections and not wired.