Windows .exe Direwolf 20 Pack Crashing Upon Launch

[MultiHexed]

I am able to see the FTB screen, but shortly after the game crashes due to a null point exception. This is the new pack, but same applies for the previous 1.5 pack. The same error everything.

Minecraft Crash Report:

Details:
    Minecraft Version: 1.5.2
    Operating System: Windows 7 (amd64) version 6.1
    Java Version: 1.7.0_25, Oracle Corporation
    Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
    Memory: 213712120 bytes (203 MB) / 259522560 bytes (247 MB) up to 4493672448 bytes (4285 MB)
    JVM Flags: 7 total; -Xms256M -Xmx4352M -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode -XX:+AggressiveOpts -XX:+CMSClassUnloadingEnabled -XX:PermSize=128m
    AABB Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
    Suspicious classes: [net.ftb.data.Settings, LauncherStyle], [net.ftb.mclauncher.MinecraftLauncher, MinecraftFrame], [net.ftb.util.OSUtils, OS, StyleUtil], [net.minecraft.Launcher]
    IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
    LWJGL: 2.4.2
    OpenGL: GeForce GTX 550 Ti/PCIe/SSE2 GL version 4.3.0, NVIDIA Corporation
    Is Modded: Very likely; Jar signature invalidated
    Type: Client (map_client.txt)
    Texture Pack: Default
    Profiler Position: N/A (disabled)
    Vec3 Pool Size: ~~ERROR~~ NullPointerException: null
 
java.lang.NullPointerException
    at javax.imageio.ImageIO.write(Unknown Source)
    at bio.b(SourceFile:278)
    at bir.b(SourceFile:154)
    at bge.d(SourceFile:350)
    at net.minecraft.client.Minecraft.a(SourceFile:298)
    at avv.a(SourceFile:56)
    at net.minecraft.client.Minecraft.run(SourceFile:507)
    at java.lang.Thread.run(Unknown Source)

Also the error report from the file:

---- Minecraft Crash Report ----
// Oops.
 
Time: 8/15/13 11:02 AM
Description: Failed to start game
 
java.lang.NullPointerException
    at javax.imageio.ImageIO.write(Unknown Source)
    at bio.b(SourceFile:278)
    at bir.b(SourceFile:154)
    at bge.d(SourceFile:350)
    at net.minecraft.client.Minecraft.a(SourceFile:298)
    at avv.a(SourceFile:56)
    at net.minecraft.client.Minecraft.run(SourceFile:507)
    at java.lang.Thread.run(Unknown Source)
 
 
A detailed walkthrough of the error, its code path and all known details is as follows:
---------------------------------------------------------------------------------------
 
-- System Details --
Details:
    Minecraft Version: 1.5.2
    Operating System: Windows 7 (amd64) version 6.1
    Java Version: 1.7.0_25, Oracle Corporation
    Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
    Memory: 199445568 bytes (190 MB) / 259522560 bytes (247 MB) up to 4493672448 bytes (4285 MB)
    JVM Flags: 7 total; -Xms256M -Xmx4352M -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode -XX:+AggressiveOpts -XX:+CMSClassUnloadingEnabled -XX:PermSize=128m
    AABB Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
    Suspicious classes: [net.ftb.data.Settings, LauncherStyle], [net.ftb.mclauncher.MinecraftLauncher, MinecraftFrame], [net.ftb.util.OSUtils, OS, StyleUtil], [net.minecraft.Launcher]
    IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
    LWJGL: 2.4.2
    OpenGL: GeForce GTX 550 Ti/PCIe/SSE2 GL version 4.3.0, NVIDIA Corporation
    Is Modded: Very likely; Jar signature invalidated
    Type: Client (map_client.txt)
    Texture Pack: Default
    Profiler Position: N/A (disabled)
    Vec3 Pool Size: ~~ERROR~~ NullPointerException: null