모드 하나도 없고 그냥 조용히 건축하려 하는데

Completely ignored arguments: [--nativeLauncherVersion, 307]
[18:47:43] [Client thread/INFO]: Setting user: Borus
[18:47:44] [Client thread/INFO]: LWJGL Version: 2.9.4
[18:47:45] [Client thread/INFO]: Reloading ResourceManager: Default
[18:47:46] [Sound Library Loader/INFO]: Starting up SoundSystem...
[18:47:46] [Thread-4/INFO]: Initializing LWJGL OpenAL
[18:47:46] [Thread-4/INFO]: (The LWJGL binding of OpenAL.  For more information, see http://www.lwjgl.org)
[18:47:46] [Thread-4/INFO]: OpenAL initialized.
[18:47:46] [Sound Library Loader/INFO]: Sound engine started
[18:47:47] [Client thread/INFO]: Created: 1024x512 textures-atlas
[18:47:54] [Client thread/INFO]: Reloading ResourceManager: Default
[18:47:55] [Client thread/INFO]: SoundSystem shutting down...
[18:47:55] [Client thread/WARN]: Author: Paul Lamb, www.paulscode.com
[18:47:55] [Sound Library Loader/INFO]: Starting up SoundSystem...
[18:47:56] [Thread-7/INFO]: Initializing LWJGL OpenAL
[18:47:56] [Thread-7/INFO]: (The LWJGL binding of OpenAL.  For more information, see http://www.lwjgl.org)
[18:47:56] [Thread-7/INFO]: OpenAL initialized.
[18:47:56] [Sound Library Loader/INFO]: Sound engine started
[18:47:56] [Client thread/INFO]: Created: 1024x512 textures-atlas
[18:47:57] [Client thread/INFO]: Reloading ResourceManager: Default
[18:47:58] [Client thread/INFO]: SoundSystem shutting down...
[18:47:58] [Client thread/WARN]: Author: Paul Lamb, www.paulscode.com
[18:47:58] [Sound Library Loader/INFO]: Starting up SoundSystem...
[18:47:58] [Thread-9/INFO]: Initializing LWJGL OpenAL
[18:47:58] [Thread-9/INFO]: (The LWJGL binding of OpenAL.  For more information, see http://www.lwjgl.org)
[18:47:58] [Thread-9/INFO]: OpenAL initialized.
[18:47:59] [Sound Library Loader/INFO]: Sound engine started
[18:47:59] [Client thread/INFO]: Created: 1024x512 textures-atlas
[18:49:01] [Client thread/INFO]: Connecting to dc-0c1f25c5-contest.fmforum.net., 49813
[18:49:03] [Client thread/INFO]: [CHAT]                                     
[18:49:03] [Client thread/INFO]: [CHAT] [+] Borus님이 접속하셨습니다.

라고 크래쉬가 뜨고 Borus님이 접속하셨습니다 다음엔 나가지고 크래쉬 뜨는데..

뭔가 서버에 부딧쳐서 그런건가요