求助有关登录器无法启动游戏的问题 登录器, 游戏, Java, 客户端, 控制台

飞奔的番茄

有一段时间没上了，打开发现上不去，以为是客户端更新了来着，但是重新下的登录器还是打不开
登陆什么的没问题 但是点开始以后客户端消失了不到两秒钟又弹出来了
Java能打开自己另外的MC程序

下为控制台输出：

[2013/9/1 0:59:03]启动参数=-Xmx1024M -jar "D:\Game\MineCraft\CirnoCraft_1_5_2_minimap_v3\launcher\LauncherWarp.jar" "Joe_King" "90ce5135202204d78a2" "CirnoCraftLauncher - CirnoCraft_1_5_2_minimap.jar" "854x480" "Mojang" "CirnoCraft_1_5_2_minimap.jar" "D:\Game\MineCraft\CirnoCraft_1_5_2_minimap_v3\.minecraft\
[2013/9/1 0:59:03]分配了内存:1024M空闲内存：1162M Build：130510223207
[2013/9/1 0:59:03]java.lang.UnsupportedClassVersionError: CirnoMCLauncher : Unsupported major.minor version 51.0
[2013/9/1 0:59:03] at java.lang.ClassLoader.defineClass1(Native Method)
[2013/9/1 0:59:03] at java.lang.ClassLoader.defineClassCond(Unknown Source)
[2013/9/1 0:59:03] at java.lang.ClassLoader.defineClass(Unknown Source)
[2013/9/1 0:59:03] at java.security.SecureClassLoader.defineClass(Unknown Source)
[2013/9/1 0:59:03] at java.net.URLClassLoader.defineClass(Unknown Source)
[2013/9/1 0:59:03] at java.net.URLClassLoader.access$000(Unknown Source)
[2013/9/1 0:59:03]
[2013/9/1 0:59:03] at java.net.URLClassLoader$1.run(Unknown Source)
[2013/9/1 0:59:03] at java.security.AccessController.doPrivileged(Native Method)
[2013/9/1 0:59:03] at java.net.URLClassLoader.findClass(Unknown Source)
[2013/9/1 0:59:03] at java.lang.ClassLoader.loadClass(Unknown Source)
[2013/9/1 0:59:03] at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
[2013/9/1 0:59:03] at java.lang.ClassLoader.loadClass(Unknown Source)
[2013/9/1 0:59:03]Could not find the main class: CirnoMCLauncher. Program will exit.
[2013/9/1 0:59:03]Exception in thread "main"
[2013/9/1 0:59:03]
[2013/9/1 0:59:03]启动参数=-Xmx1024M -jar "D:\Game\MineCraft\CirnoCraft_1_5_2_minimap_v3\launcher\LauncherWarp.jar" "Joe_King" "90ce5135202204d78a2" "CirnoCraftLauncher - CirnoCraft_1_5_2_minimap.jar" "854x480" "Mojang" "CirnoCraft_1_5_2_minimap.jar" "D:\Game\MineCraft\CirnoCraft_1_5_2_minimap_v3\.minecraft\
[2013/9/1 0:59:03]分配了内存:1024M空闲内存：1167M Build：130510223207
[2013/9/1 0:59:03]游戏已终止.若游戏是非正常结束(例如报错、崩溃),请将本框内的信息全选发送给⑨.

就是这样了 求助