DAC115

I am having trying to play tekkit classic, but it won't even launch it, it will just stay in the launcher. Any help? Here is the console while trying to launch it. Running /System/Library/Java/JavaVirtualMachines/1.6.0.jdk/Contents/Home/bin/java -Xdock:name=Tekkit Classic -Xmx1024m -XX:MaxPermSize=128m -Djava.library.path=/Users/elizabethcullin/Library/Application Support/technic/modpacks/tekkit/bin/natives -Dminecraft.applet.TargetDirectory=/Users/elizabethcullin/Library/Application Support/technic/modpacks/tekkit -cp /Users/elizabethcullin/Library/Application Support/technic/cache/net/technicpack/legacywrapper/1.0-SNAPSHOT/legacywrapper-1.0-SNAPSHOT.jar:/Users/elizabethcullin/Library/Application Support/technic/cache/net/sf/jopt-simple/jopt-simple/4.5/jopt-simple-4.5.jar:/Users/elizabethcullin/Library/Application Support/technic/cache/org/ow2/asm/asm-all/4.1/asm-all-4.1.jar:/Users/elizabethcullin/Library/Application Support/technic/cache/net/java/jinput/jinput/2.0.5/jinput-2.0.5.jar:/Users/elizabethcullin/Library/Application Support/technic/cache/net/java/jutils/jutils/1.0.0/jutils-1.0.0.jar:/Users/elizabethcullin/Library/Application Support/technic/cache/org/lwjgl/lwjgl/lwjgl/2.9.0/lwjgl-2.9.0.jar:/Users/elizabethcullin/Library/Application Support/technic/cache/org/lwjgl/lwjgl/lwjgl_util/2.9.0/lwjgl_util-2.9.0.jar:/Users/elizabethcullin/Library/Application Support/technic/modpacks/tekkit/bin/modpack.jar:/Users/elizabethcullin/Library/Application Support/technic/modpacks/tekkit/bin/minecraft.jar net.technicpack.legacywrapper.Launch DAC115 token:1772ec31b02a40a39f8284f9a0ab21e6:c7e659f6529445ddba1f0ec42af96b03 --gameDir /Users/elizabethcullin/Library/Application Support/technic/modpacks/tekkit --assetsDir /Users/elizabethcullin/Library/Application Support/technic/assets Exception in thread "main" java.lang.UnsupportedClassVersionError: net/technicpack/legacywrapper/Launch : Unsupported major.minor version 51.0 at java.lang.ClassLoader.defineClass1(Native Method) at java.lang.ClassLoader.defineClassCond(ClassLoader.java:637) at java.lang.ClassLoader.defineClass(ClassLoader.java:621) at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:141) at java.net.URLClassLoader.defineClass(URLClassLoader.java:283) at java.net.URLClassLoader.access$000(URLClassLoader.java:58) at java.net.URLClassLoader$1.run(URLClassLoader.java:197) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:190) at java.lang.ClassLoader.loadClass(ClassLoader.java:306) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301) at java.lang.ClassLoader.loadClass(ClassLoader.java:247)