Your auto-updating? you're gonna have to reinstall your game then because the server only supports C1... But when you do that just download the patch
http://www.corfro.com/ul2patch.rar and the login fix
http://213.112.96.44/ul2loginchangenw.rar
Then all you do is extract the ul2patch into you c:\program files\lineage II folder, then extract the login change file into the same place and your done. BTW do NOT run the game from the c:\program files\lineage II\lineage II.exe !!!! when you want to play, create a shourtcut to c:\program files\lineage II\system\L2.exe and start the game from that.