gamepower37

I want to open minecraft forge 1.7.2 but the window does not open this is the crash log : [10:22:18] [main/INFO] [LaunchWrapper]: Loading tweak class name cpw.mods.fml.common.launcher.FMLTweaker [10:22:18] [main/INFO] [LaunchWrapper]: Using primary tweak class name cpw.mods.fml.common.launcher.FMLTweaker [10:22:18] [main/INFO] [LaunchWrapper]: Calling tweak class cpw.mods.fml.common.launcher.FMLTweaker [10:22:18] [main/INFO] [FML]: Forge Mod Loader version 7.2.211.1121 for Minecraft 1.7.2 loading [10:22:18] [main/INFO] [FML]: Java is Java HotSpot Client VM, version 1.8.0_25, running on Windows 7:x86:6.1, installed at D:\Program Files\Java\jre1.8.0_25 [10:22:18] [main/INFO] [LaunchWrapper]: Loading tweak class name cpw.mods.fml.common.launcher.FMLInjectionAndSortingTweaker [10:22:18] [main/INFO] [LaunchWrapper]: Loading tweak class name cpw.mods.fml.common.launcher.FMLDeobfTweaker [10:22:18] [main/INFO] [LaunchWrapper]: Calling tweak class cpw.mods.fml.common.launcher.FMLInjectionAndSortingTweaker [10:22:18] [main/ERROR] [LaunchWrapper]: Unable to launch java.util.ConcurrentModificationException at java.util.ArrayList$Itr.checkForComodification(Unknown Source) ~[?:1.8.0_25] at java.util.ArrayList$Itr.remove(Unknown Source) ~[?:1.8.0_25] at net.minecraft.launchwrapper.Launch.launch(Launch.java:117) [launchwrapper-1.9.jar:?] at net.minecraft.launchwrapper.Launch.main(Launch.java:28) [launchwrapper-1.9.jar:?] Java HotSpot Client VM warning: Using incremental CMS is deprecated and will likely be removed in a future release Can you guys help me ?