Does having a wireless adapter make a difference?

So, a few days left on my free 30 day trial for FFXIV last year....my source of internet got quickly changed to using a ethernet cord to a wireless usb adapter antenna. I play other MMos too and never had such an issue. Anyways, the error "2002" kept popping up and closing my launcher ever since I switched to the antenna...but does it make that much of a difference if I switched back to the ethernet cord? I have tried port forwarding, disabling my firewalls...nothing seems to work. The only way I can think of is trying to use an actual cord again. Any thoughts?

I use a wireless adapter with no problems. Although, the first one I had was pretty cheap and disconnected about every 10 minutes no matter what I was doing. When I got a more expensive one the same brand of my router everything has been working fine.

Im using a Tenda W322U Wireless N 300Mbps USB 2.0 Adapter. Bought it for 12.99 @ Microcenter last year. I have never had an issue with any other MMos ever since Ive been using it. Til I wanted to get back into ffxiv, I kept getting the error 2002. Maybe a server congestion?

In that case, my guess would be the server/game because a few players are getting error 2002. Apparently for some it just started after the maintenance. My PC has been shutting down after about 20 minutes of playing since the maintenance. I cleaned the inside of it, updated drivers, and ran some other games and it only happens with ffxiv.

Its the error "2002". The problem lies with all the servers, including Europe and Japan that they are congested, too many players trying to log into the game. The Devs need to sooner or later add more servers so then the traffic of players can be more easily smoother.