RegisterGameServer.bat error

[tks2204]

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L2J Revision Number: 4470
L2JDP Revision Number: 7733

i have downloaded and extracted the l2j_datapack and l2j_server, got all SQL into Navicat and so on, but atm when i start the RegisterGamerServer.bat i get this error

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1. Exception in thread "main" java.lang.UnsupportedClassVersionError: com/l2jserver
2. /gsregistering/BaseGameServerRegister : Unsupported major.minor version 51.0
3.         at java.lang.ClassLoader.defineClass1(Native Method)
4.         at java.lang.ClassLoader.defineClassCond(Unknown Source)
5.         at java.lang.ClassLoader.defineClass(Unknown Source)
6.         at java.security.SecureClassLoader.defineClass(Unknown Source)
7.         at java.net.URLClassLoader.defineClass(Unknown Source)
8.         at java.net.URLClassLoader.access$000(Unknown Source)
9.         at java.net.URLClassLoader$1.run(Unknown Source)
10.         at java.security.AccessController.doPrivileged(Native Method)
11.         at java.net.URLClassLoader.findClass(Unknown Source)
12.         at java.lang.ClassLoader.loadClass(Unknown Source)
13.         at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
14.         at java.lang.ClassLoader.loadClass(Unknown Source)
15. Could not find the main class: com.l2jserver.gsregistering.BaseGameServerRegiste
16. r.  Program will exit.
17. Press any key to continue. . .

Can anybody help to solve this?

[tukune]

Unsupported major.minor version 51.0

you using java 6.
L2J need java 7.

[tks2204]

Working. Thanks.