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I've been looking around at fixes to this, but I haven't found anything that has worked so far. Perhaps someone can tell me when I'm doing wrong. I've reinstalled everything and it just comes up with the same error. It's Minecraft Forge 1.7.2 and, whether or not I have mods actually installed, it crashes whenever I try to load a world.

---- Minecraft Crash Report ----
// I blame Dinnerbone.

Time: 4/24/14 8:13 PM
Description: Starting integrated server

java.lang.ExceptionInInitializerError
at net.minecraft.server.MinecraftServer.<init>(MinecraftServer.java:161)
at net.minecraft.server.integrated.IntegratedServer.<init>(IntegratedServer.java:46)
at net.minecraft.client.Minecraft.func_71371_a(Minecraft.java:2090)
at net.minecraft.client.gui.GuiCreateWorld.func_146284_a(GuiCreateWorld.java:233)
at net.minecraft.client.gui.GuiScreen.func_73864_a(GuiScreen.java:233)
at net.minecraft.client.gui.GuiCreateWorld.func_73864_a(GuiCreateWorld.java:382)
at net.minecraft.client.gui.GuiScreen.func_146274_d(GuiScreen.java:309)
at net.minecraft.client.gui.GuiScreen.func_146269_k(GuiScreen.java:275)
at net.minecraft.client.Minecraft.func_71407_l(Minecraft.java:1627)
at net.minecraft.client.Minecraft.func_71411_J(Minecraft.java:955)
at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:873)
at net.minecraft.client.main.Main.main(SourceFile:103)
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:134)
at net.minecraft.launchwrapper.Launch.main(Launch.java:28)
Caused by: java.lang.IllegalStateException: failed to create a child event loop
at io.netty.util.concurrent.MultithreadEventExecutorGroup.<init>(MultithreadEventExecutorGroup.java:61)
at io.netty.channel.MultithreadEventLoopGroup.<init>(MultithreadEventLoopGroup.java:49)
at io.netty.channel.nio.NioEventLoopGroup.<init>(NioEventLoopGroup.java:61)
at io.netty.channel.nio.NioEventLoopGroup.<init>(NioEventLoopGroup.java:52)
at net.minecraft.network.NetworkSystem.<clinit>(NetworkSystem.java:47)
... 18 more
Caused by: io.netty.channel.ChannelException: failed to open a new selector
at io.netty.channel.nio.NioEventLoop.openSelector(NioEventLoop.java:128)
at io.netty.channel.nio.NioEventLoop.<init>(NioEventLoop.java:120)
at io.netty.channel.nio.NioEventLoopGroup.newChild(NioEventLoopGroup.java:87)
at io.netty.util.concurrent.MultithreadEventExecutorGroup.<init>(MultithreadEventExecutorGroup.java:57)
... 22 more
Caused by: java.io.IOException: Unable to establish loopback connection
at sun.nio.ch.PipeImpl$Initializer.run(Unknown Source)
at sun.nio.ch.PipeImpl$Initializer.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at sun.nio.ch.PipeImpl.<init>(Unknown Source)
at sun.nio.ch.SelectorProviderImpl.openPipe(Unknown Source)
at java.nio.channels.Pipe.open(Unknown Source)
at sun.nio.ch.WindowsSelectorImpl.<init>(Unknown Source)
at sun.nio.ch.WindowsSelectorProvider.openSelector(Unknown Source)
at io.netty.channel.nio.NioEventLoop.openSelector(NioEventLoop.java:126)
... 25 more
Caused by: java.net.ConnectException: Connection timed out: connect
at sun.nio.ch.Net.connect0(Native Method)
at sun.nio.ch.Net.connect(Unknown Source)
at sun.nio.ch.Net.connect(Unknown Source)
at sun.nio.ch.SocketChannelImpl.connect(Unknown Source)
at java.nio.channels.SocketChannel.open(Unknown Source)
... 34 more


A detailed walkthrough of the error, its code path and all known details is as follows:
---------------------------------------------------------------------------------------

-- Head --
Stacktrace:
at net.minecraft.server.MinecraftServer.<init>(MinecraftServer.java:161)
at net.minecraft.server.integrated.IntegratedServer.<init>(IntegratedServer.java:46)

-- Starting integrated server --
Details:
Level ID: New World
Level Name: New World
Stacktrace:
at net.minecraft.client.Minecraft.func_71371_a(Minecraft.java:2090)
at net.minecraft.client.gui.GuiCreateWorld.func_146284_a(GuiCreateWorld.java:233)
at net.minecraft.client.gui.GuiScreen.func_73864_a(GuiScreen.java:233)
at net.minecraft.client.gui.GuiCreateWorld.func_73864_a(GuiCreateWorld.java:382)
at net.minecraft.client.gui.GuiScreen.func_146274_d(GuiScreen.java:309)
at net.minecraft.client.gui.GuiScreen.func_146269_k(GuiScreen.java:275)

-- Affected screen --
Details:
Screen name: net.minecraft.client.gui.GuiMainMenu
Stacktrace:
at net.minecraft.client.Minecraft.func_71407_l(Minecraft.java:1627)
at net.minecraft.client.Minecraft.func_71411_J(Minecraft.java:955)
at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:873)
at net.minecraft.client.main.Main.main(SourceFile:103)
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:134)
at net.minecraft.launchwrapper.Launch.main(Launch.java:28)

-- System Details --
Details:
Minecraft Version: 1.7.2
Operating System: Windows 8 (x86) version 6.2
Java Version: 1.7.0_55, Oracle Corporation
Java VM Version: Java HotSpot(TM) Client VM (mixed mode, sharing), Oracle Corporation
Memory: 108015704 bytes (103 MB) / 208609280 bytes (198 MB) up to 518979584 bytes (494 MB)
JVM Flags: 2 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx512M
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 v9.01-pre FML v7.2.125.1032 Minecraft Forge 10.12.0.1032 4 mods loaded, 4 mods active
mcp{8.09} [Minecraft Coder Pack] (minecraft.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available
FML{7.2.125.1032} [Forge Mod Loader] (forge-1.7.2-10.12.0.1032.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available
Forge{10.12.0.1032} [Minecraft Forge] (forge-1.7.2-10.12.0.1032.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available
moreplayermodels{1.7.2} [MorePlayerModels] (MorePlayerModels_1.7.2.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available
Launched Version: 1.7.2-Forge10.12.0.1032
LWJGL: 2.9.0
OpenGL: Intel(R) HD Graphics 3000 GL version 3.1.0 - Build 9.17.10.2849, Intel
Is Modded: Definitely; Client brand changed to 'fml,forge'
Type: Client (map_client.txt)
Resource Packs: [Music-of-Altera-Boulderpaul.zip, World-of-Altera-Boulderpaul.zip]
Current Language: English (US)
Profiler Position: N/A (disabled)
Vec3 Pool Size: ~~ERROR~~ NullPointerException: null
Anisotropic Filtering: Off (1)