Forge 1.7.10 won't start

[u_player]

[14:57:21] [main/INFO] [LaunchWrapper]: Loading tweak class name cpw.mods.fml.common.launcher.FMLTweaker

[14:57:21] [main/INFO] [LaunchWrapper]: Using primary tweak class name cpw.mods.fml.common.launcher.FMLTweaker

[14:57:21] [main/INFO] [LaunchWrapper]: Calling tweak class cpw.mods.fml.common.launcher.FMLTweaker

[14:57:22] [main/INFO] [FML]: Forge Mod Loader version 7.99.40.1614 for Minecraft 1.7.10 loading

[14:57:22] [main/INFO] [FML]: Java is Java HotSpot Client VM, version 1.8.0_111, running on Windows 7:x86:6.1, installed at C:\Program Files\Java\jre1.8.0_111

[14:57:22] [main/INFO] [FML]: [AppEng] Core Init

[14:57:22] [main/WARN] [FML]: The coremod codechicken.core.launch.CodeChickenCorePlugin does not have a MCVersion annotation, it may cause issues with this version of Minecraft

[14:57:24] [main/INFO] [sTDERR]: [codechicken.core.launch.DepLoader$DepLoadInst:checkExisting:436]: Warning: version of bspkrsCore, 6.16 is newer than request 6.15

[14:57:24] [main/WARN] [FML]: The coremod cofh.asm.LoadingPlugin does not have a MCVersion annotation, it may cause issues with this version of Minecraft

[14:57:24] [main/WARN] [FML]: The coremod invtweaks.forge.asm.FMLPlugin does not have a MCVersion annotation, it may cause issues with this version of Minecraft

[14:57:24] [main/WARN] [FML]: The coremod codechicken.nei.asm.NEICorePlugin does not have a MCVersion annotation, it may cause issues with this version of Minecraft

[14:57:24] [main/INFO] [LaunchWrapper]: Loading tweak class name cpw.mods.fml.common.launcher.FMLInjectionAndSortingTweaker

[14:57:24] [main/INFO] [LaunchWrapper]: Loading tweak class name cpw.mods.fml.common.launcher.FMLDeobfTweaker

[14:57:24] [main/INFO] [LaunchWrapper]: Calling tweak class cpw.mods.fml.common.launcher.FMLInjectionAndSortingTweaker

Exception in thread "main" [14:57:24] [main/INFO] [sTDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1]: java.lang.IncompatibleClassChangeError

[14:57:24] [main/INFO] [sTDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1]: at java.util.TimSort.countRunAndMakeAscending(Unknown Source)

[14:57:24] [main/INFO] [sTDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1]: at java.util.TimSort.sort(Unknown Source)

[14:57:24] [main/INFO] [sTDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1]: at java.util.Arrays.sort(Unknown Source)

[14:57:24] [main/INFO] [sTDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1]: at cpw.mods.fml.relauncher.CoreModManager.sort(CoreModManager.java)

[14:57:24] [main/INFO] [sTDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1]: at cpw.mods.fml.relauncher.CoreModManager.sortTweakList(CoreModManager.java)

[14:57:24] [main/INFO] [sTDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1]: at cpw.mods.fml.common.launcher.FMLInjectionAndSortingTweaker.acceptOptions(FMLInjectionAndSortingTweaker.java:33)

[14:57:24] [main/INFO] [sTDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1]: at net.minecraft.launchwrapper.Launch.launch(Launch.java:114)

[14:57:24] [main/INFO] [sTDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1]: at net.minecraft.launchwrapper.Launch.main(Launch.java:28)

 

anyone knows what's the problem?