Dedicated multicraft error.

[EngagedRage]

Hello,
I was wondering if anyone would be able to help me installing a custom jar into my multicraft I'm having a terrible time getting this to work, for some reason when I place in the "custom" jar it gives me this error.

20.01 08:18:02 [Multicraft] Received start command
20.01 08:18:02 [Multicraft] Loading server properties
20.01 08:18:02 [Multicraft] Starting server!
20.01 08:18:02 [Multicraft] Loaded config for "Default Minecraft Server"
20.01 08:18:02 [Server] INFO Exception in thread "main" java.lang.UnsupportedClassVersionError: org/bukkit/craftbukkit/Main : Unsupported major.minor version 52.0
20.01 08:18:02 [Server] INFO at java.lang.ClassLoader.defineClass1(Native Method)
20.01 08:18:02 [Server] INFO at java.lang.ClassLoader.defineClass(ClassLoader.java:803)
20.01 08:18:02 [Server] INFO at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
20.01 08:18:02 [Server] INFO at java.net.URLClassLoader.defineClass(URLClassLoader.java:442)
20.01 08:18:02 [Server] INFO at java.net.URLClassLoader.access$100(URLClassLoader.java:64)
20.01 08:18:02 [Server] INFO at java.net.URLClassLoader$1.run(URLClassLoader.java:354)
20.01 08:18:02 [Server] INFO at java.net.URLClassLoader$1.run(URLClassLoader.java:348)
20.01 08:18:02 [Server] INFO at java.security.AccessController.doPrivileged(Native Method)
20.01 08:18:02 [Server] INFO at java.net.URLClassLoader.findClass(URLClassLoader.java:347)
20.01 08:18:02 [Server] INFO at java.lang.ClassLoader.loadClass(ClassLoader.java:425)
20.01 08:18:02 [Server] INFO at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
20.01 08:18:02 [Server] INFO at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
20.01 08:18:02 [Server] INFO at sun.launcher.LauncherHelper.checkAndLoadMain(LauncherHelper.java:482)
20.01 08:18:02 [Multicraft] Server shut down (starting)
20.01 08:18:02 [Multicraft] Restarting crashed server in 5 seconds
20.01 08:18:02 [Multicraft] Looks like a crash, check the server console. Return value: 1 20.01 08:18:02 [Multicraft] Server stopped

I posted a picture below of the options I have. I'm not 100% positive I'm selecting the correct option.
Please advise,
Engaged_rage

 

[Samuel]

Your jar is outdated as stated in the logs..[DOUBLEPOST=1484918752][/DOUBLEPOST]The java.lang to be specific

Java version is incorrect, not a jar issue.

 

[EngagedRage]

Ah, ok thanks!