Crashes when opening

When putting RailsOfWar-1.7.10-5.8-RC3.jar or RailsOfWar-1.7.10-5.8-RC4.jar and open Minecraft, its crashed.
Description:
---- Minecraft Crash Report ----
// Don't be sad, have a hug! <3

Time: 9/13/16 11:29 PM
Description: There was a severe problem during mod loading that has caused the game to fail

cpw.mods.fml.common.LoaderException: java.lang.ClassNotFoundException: net.row.RoW
    at cpw.mods.fml.common.LoadController.transition(LoadController.java:163)
    at cpw.mods.fml.common.Loader.loadMods(Loader.java:544)
    at cpw.mods.fml.client.FMLClientHandler.beginMinecraftLoading(FMLClientHandler.java:208)
    at net.minecraft.client.Minecraft.func_71384_a(Minecraft.java:480)
    at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:878)
    at net.minecraft.client.main.Main.main(SourceFile:148)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    at java.lang.reflect.Method.invoke(Unknown Source)
    at net.minecraft.launchwrapper.Launch.launch(Launch.java:135)
    at net.minecraft.launchwrapper.Launch.main(Launch.java:28)
Caused by: java.lang.ClassNotFoundException: net.row.RoW
    at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:191)
    at java.lang.ClassLoader.loadClass(Unknown Source)
    at java.lang.ClassLoader.loadClass(Unknown Source)
    at cpw.mods.fml.common.ModClassLoader.loadClass(ModClassLoader.java:58)
    at java.lang.Class.forName0(Native Method)
    at java.lang.Class.forName(Unknown Source)
    at cpw.mods.fml.common.FMLModContainer.constructMod(FMLModContainer.java:440)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    at java.lang.reflect.Method.invoke(Unknown Source)
    at com.google.common.eventbus.EventSubscriber.handleEvent(EventSubscriber.java:74)
    at com.google.common.eventbus.SynchronizedEventSubscriber.handleEvent(SynchronizedEventSubscriber.java:47)
    at com.google.common.eventbus.EventBus.dispatch(EventBus.java:322)
    at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:304)
    at com.google.common.eventbus.EventBus.post(EventBus.java:275)
    at cpw.mods.fml.common.LoadController.sendEventToModContainer(LoadController.java:212)
    at cpw.mods.fml.common.LoadController.propogateStateMessage(LoadController.java:190)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    at java.lang.reflect.Method.invoke(Unknown Source)
    at com.google.common.eventbus.EventSubscriber.handleEvent(EventSubscriber.java:74)
    at com.google.common.eventbus.SynchronizedEventSubscriber.handleEvent(SynchronizedEventSubscriber.java:47)
    at com.google.common.eventbus.EventBus.dispatch(EventBus.java:322)
    at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:304)
    at com.google.common.eventbus.EventBus.post(EventBus.java:275)
    at cpw.mods.fml.common.LoadController.distributeStateMessage(LoadController.java:119)
    at cpw.mods.fml.common.Loader.loadMods(Loader.java:513)
    ... 10 more
Caused by: java.lang.UnsupportedClassVersionError: net/row/RoW : Unsupported major.minor version 52.0
    at java.lang.ClassLoader.defineClass1(Native Method)
    at java.lang.ClassLoader.defineClass(Unknown Source)
    at java.security.SecureClassLoader.defineClass(Unknown Source)
    at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:182)
    ... 38 more


A detailed walkthrough of the error, its code path and all known details is as follows:
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-- System Details --
Details:
    Minecraft Version: 1.7.10
    Operating System: Windows 8.1 (amd64) version 6.3
    Java Version: 1.7.0_80, Oracle Corporation
    Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
    Memory: 113944856 bytes (108 MB) / 291414016 bytes (277 MB) up to 1060372480 bytes (1011 MB)
    JVM Flags: 6 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx1G -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode -XX:-UseAdaptiveSizePolicy -Xmn128M
    AABB Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
    IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
    FML: MCP v9.05 FML v7.10.99.99 Minecraft Forge 10.13.4.1614 18 mods loaded, 18 mods active
    States: 'U' = Unloaded 'L' = Loaded 'C' = Constructed 'H' = Pre-initialized 'I' = Initialized 'J' = Post-initialized 'A' = Available 'D' = Disabled 'E' = Errored
    UC  mcp{9.05} [Minecraft Coder Pack] (minecraft.jar) 
    UC  FML{7.10.99.99} [Forge Mod Loader] (forge-1.7.10-10.13.4.1614-1.7.10.jar) 
    UC  Forge{10.13.4.1614} [Minecraft Forge] (forge-1.7.10-10.13.4.1614-1.7.10.jar) 
    UC  CodeChickenCore{1.0.7.47} [CodeChicken Core] (minecraft.jar) 
    UC  OldModelLoader{1.4.4} [LMMNX OldModelLoader] (minecraft.jar) 
    UC  NotEnoughItems{1.0.5.120} [Not Enough Items] (NotEnoughItems-1.7.10-1.0.5.120-universal.jar) 
    UC  BuildCraft|Core{7.1.18} [BuildCraft] (buildcraft-7.1.18.jar) 
    UC  BuildCraft|Transport{7.1.18} [BC Transport] (buildcraft-7.1.18.jar) 
    UC  BuildCraft|Silicon{7.1.18} [BC Silicon] (buildcraft-7.1.18.jar) 
    UC  BuildCraft|Energy{7.1.18} [BC Energy] (buildcraft-7.1.18.jar) 
    UC  BuildCraft|Factory{7.1.18} [BC Factory] (buildcraft-7.1.18.jar) 
    UC  BuildCraft|Builders{7.1.18} [BC Builders] (buildcraft-7.1.18.jar) 
    UC  BuildCraft|Robotics{7.1.18} [BC Robotics] (buildcraft-7.1.18.jar) 
    UC  lmmx{10} [LittleMaidMobEnhanced] (LittleMaidMobEnhanced-1.7.10-1.4.4.jar) 
    UC  Railcraft{9.12.2.0} [Railcraft] (Railcraft_1.7.10-9.12.2.0.jar) 
    UC  railcraft_cos{1.0} [Railcraft Cosmetic Additions] (Railcraft_Cosmetics-1.7.10-1.0.jar) 
    UE  row{1.7.10-5.8-RC3} [Rails of War] (RailsOfWar-1.7.10-5.8-RC3.jar) 
    UC  tc{4.3.0_003} [Traincraft] (Traincraft-4.3.0_003.jar) 
    GL info: ' Vendor: 'Intel' Version: '2.1.0 - Build 8.15.10.2900' Renderer: 'Intel(R) HD Graphics'
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