Go to Windows\System32\drivers\etc and open hosts file with Notepad
Add these two lines at the end of the file
117.52.88.74 eupdate.kalonline.com
117.52.88.96 kalonline.gameagit.com
and save file....now u can open kalonline.gameagit.com and join game too
if u cant Edit hosts file for any reson ( win 8) do that
Right click the Hosts file and select > Properties
Click the Security tab
Highlight your user account in the list
Press the Edit button
Select (place a check in) Full control
Press OK in the various dialogue boxes to confirm the changes.