Please try to clear (not delete!) the content of C:\Windows\System32\drivers\etc\hosts file content if you encounter this xigncode issue. http://wiki.mudfish.net/LOST%20ARK

I did this and it is not working

I'm not sure it worked for you but you can try to Full VPN mode then make a Korean account then get the stove client manually at http://www.onstove.com/