On my screen the game doesnt go upto 2560x1400 it only goes upto 1900x1200 how do i make it go all the way full screen

On the launcher, choose Environment Settings and go to the "Screen" tab. There, choose "Virtual Full Screen." It's the same as using a borderless window mode.

I did that now everytime i open the game it takes me to some weird website lol takes me here : http://www.gameguard.co.kr/eng/con_06.html

Anyone know?