Voltz white screens and wont load

[NitemareSlasher]

It is downloaded but it gets stuck in a white screen the FML box appears and then shortly after disappears I am running it on a normal PC. Its is NOT a mac (i dare not ever use one)

Here is the FML log:

2013-01-14 20:24:30 [iNFO] [ForgeModLoader] Forge Mod Loader version 4.7.4.520 for Minecraft 1.4.7 loading

2013-01-14 20:24:30 [FINEST] [ForgeModLoader] All core mods are successfully located

2013-01-14 20:24:30 [FINEST] [ForgeModLoader] Discovering coremods

2013-01-14 20:24:30 [FINEST] [ForgeModLoader] Found a candidate coremod CodeChickenCore 0.7.0.1.jar

2013-01-14 20:24:30 [FINEST] [ForgeModLoader] Loading coremod CodeChickenCore 0.7.0.1.jar

2013-01-14 20:24:30 [FINEST] [ForgeModLoader] Loaded coremod CodeChickenCore 0.7.0.1.jar

2013-01-14 20:24:30 [FINEST] [ForgeModLoader] Found a candidate coremod NotEnoughItems 1.4.4.0.jar

2013-01-14 20:24:30 [FINEST] [ForgeModLoader] Loading coremod NotEnoughItems 1.4.4.0.jar

2013-01-14 20:24:30 [FINEST] [ForgeModLoader] Loaded coremod NotEnoughItems 1.4.4.0.jar

2013-01-14 20:24:30 [FINEST] [ForgeModLoader] Found library file argo-2.25.jar present and correct in lib dir

2013-01-14 20:24:30 [FINEST] [ForgeModLoader] Found library file guava-12.0.1.jar present and correct in lib dir

2013-01-14 20:24:30 [FINEST] [ForgeModLoader] Found library file asm-all-4.0.jar present and correct in lib dir

2013-01-14 20:24:30 [FINEST] [ForgeModLoader] Downloading file http://files.minecraftforge.net/fmllibs/bcprov-jdk15on-147.jar

2013-01-14 20:24:30 [iNFO] [ForgeModLoader] Downloading file http://files.minecraftforge.net/fmllibs/bcprov-jdk15on-147.jar

2013-01-14 20:25:03 [FINEST] [ForgeModLoader] Download complete

2013-01-14 20:25:03 [iNFO] [ForgeModLoader] Download complete

2013-01-14 20:25:03 [FINEST] [ForgeModLoader] Library file bcprov-jdk15on-147.jar was downloaded and verified successfully

2013-01-14 20:25:03 [FINEST] [ForgeModLoader] Running coremod plugins

2013-01-14 20:25:03 [FINEST] [ForgeModLoader] Running coremod plugin FMLCorePlugin

2013-01-14 20:25:03 [iNFO] [ForgeModLoader] Found valid fingerprint for Minecraft Forge. Certificate fingerprint de4cf8a3f3bc15635810044c39240bf96804ea7d

2013-01-14 20:25:03 [FINEST] [ForgeModLoader] Coremod plugin FMLCorePlugin run successfully

2013-01-14 20:25:03 [FINEST] [ForgeModLoader] Running coremod plugin FMLForgePlugin

2013-01-14 20:25:03 [FINEST] [ForgeModLoader] Coremod plugin FMLForgePlugin run successfully

2013-01-14 20:25:03 [FINEST] [ForgeModLoader] Running coremod plugin CodeChickenCorePlugin

2013-01-14 20:25:03 [iNFO] [sTDOUT] Adding Accesstransformer map: codechickencore_at.cfg

2013-01-14 20:25:03 [FINEST] [ForgeModLoader] Coremod plugin CodeChickenCorePlugin run successfully

2013-01-14 20:25:03 [FINEST] [ForgeModLoader] Running coremod plugin NEICorePlugin

2013-01-14 20:25:03 [iNFO] [sTDOUT] Adding Accesstransformer map: nei_at.cfg

2013-01-14 20:25:03 [FINEST] [ForgeModLoader] Coremod plugin NEICorePlugin run successfully

2013-01-14 20:25:03 [FINEST] [ForgeModLoader] Validating minecraft

2013-01-14 20:25:04 [FINEST] [ForgeModLoader] Minecraft validated, launching...

2013-01-14 20:25:04 [iNFO] [sTDOUT] Inserted super call into avz.c

2013-01-14 20:25:04 [iNFO] [sTDOUT] avf was overriden from NotEnoughItems 1.4.4.0.jar

2013-01-14 20:25:04 [iNFO] [sTDERR] Exception in thread "AWT-EventQueue-0" java.lang.RuntimeException: cpw.mods.fml.relauncher.ReflectionHelper$UnableToFindClassException: java.lang.ClassNotFoundException: net.minecraft.Launcher

2013-01-14 20:25:04 [iNFO] [sTDERR]at cpw.mods.fml.relauncher.FMLRelauncher.relaunchApplet(FMLRelauncher.java:269)

2013-01-14 20:25:04 [iNFO] [sTDERR]at cpw.mods.fml.relauncher.FMLRelauncher.appletEntry(FMLRelauncher.java:212)

2013-01-14 20:25:04 [iNFO] [sTDERR]at net.minecraft.client.MinecraftApplet.init(MinecraftApplet.java:25)

2013-01-14 20:25:04 [iNFO] [sTDERR]at org.spoutcraft.launcher.MinecraftAppletEnglober.init(MinecraftAppletEnglober.java:110)

2013-01-14 20:25:04 [iNFO] [sTDERR]at org.spoutcraft.launcher.gui.LauncherFrame.runGame(LauncherFrame.java:114)

2013-01-14 20:25:04 [iNFO] [sTDERR]at org.spoutcraft.launcher.gui.LoginForm.runGame(LoginForm.java:900)

2013-01-14 20:25:04 [iNFO] [sTDERR]at org.spoutcraft.launcher.gui.LoginForm$3.done(LoginForm.java:834)

2013-01-14 20:25:04 [iNFO] [sTDERR]at javax.swing.SwingWorker$5.run(Unknown Source)

2013-01-14 20:25:04 [iNFO] [sTDERR]at javax.swing.SwingWorker$DoSubmitAccumulativeRunnable.run(Unknown Source)

2013-01-14 20:25:04 [iNFO] [sTDERR]at sun.swing.AccumulativeRunnable.run(Unknown Source)

2013-01-14 20:25:04 [iNFO] [sTDERR]at javax.swing.SwingWorker$DoSubmitAccumulativeRunnable.actionPerformed(Unknown Source)

2013-01-14 20:25:04 [iNFO] [sTDERR]at javax.swing.Timer.fireActionPerformed(Unknown Source)

2013-01-14 20:25:04 [iNFO] [sTDERR]at javax.swing.Timer$DoPostEvent.run(Unknown Source)

2013-01-14 20:25:04 [iNFO] [sTDERR]at java.awt.event.InvocationEvent.dispatch(Unknown Source)

2013-01-14 20:25:04 [iNFO] [sTDERR]at java.awt.EventQueue.dispatchEventImpl(Unknown Source)

2013-01-14 20:25:04 [iNFO] [sTDERR]at java.awt.EventQueue.access$000(Unknown Source)

2013-01-14 20:25:04 [iNFO] [sTDERR]at java.awt.EventQueue$3.run(Unknown Source)

2013-01-14 20:25:04 [iNFO] [sTDERR]at java.awt.EventQueue$3.run(Unknown Source)

2013-01-14 20:25:04 [iNFO] [sTDERR]at java.security.AccessController.doPrivileged(Native Method)

2013-01-14 20:25:04 [iNFO] [sTDERR]at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source)

2013-01-14 20:25:04 [iNFO] [sTDERR]at java.awt.EventQueue.dispatchEvent(Unknown Source)

2013-01-14 20:25:04 [iNFO] [sTDERR]at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)

2013-01-14 20:25:04 [iNFO] [sTDERR]at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)

2013-01-14 20:25:04 [iNFO] [sTDERR]at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)

2013-01-14 20:25:04 [iNFO] [sTDERR]at java.awt.EventDispatchThread.pumpEvents(Unknown Source)

2013-01-14 20:25:04 [iNFO] [sTDERR]at java.awt.EventDispatchThread.pumpEvents(Unknown Source)

2013-01-14 20:25:04 [iNFO] [sTDERR]at java.awt.EventDispatchThread.run(Unknown Source)

2013-01-14 20:25:04 [iNFO] [sTDERR] Caused by: cpw.mods.fml.relauncher.ReflectionHelper$UnableToFindClassException: java.lang.ClassNotFoundException: net.minecraft.Launcher

2013-01-14 20:25:04 [iNFO] [sTDERR]at cpw.mods.fml.relauncher.ReflectionHelper.getClass(ReflectionHelper.java:159)

2013-01-14 20:25:04 [iNFO] [sTDERR]at cpw.mods.fml.relauncher.FMLRelauncher.relaunchApplet(FMLRelauncher.java:254)

2013-01-14 20:25:04 [iNFO] [sTDERR]... 26 more

2013-01-14 20:25:04 [iNFO] [sTDERR] Caused by: java.lang.ClassNotFoundException: net.minecraft.Launcher

2013-01-14 20:25:04 [iNFO] [sTDERR]at java.net.URLClassLoader$1.run(Unknown Source)

2013-01-14 20:25:04 [iNFO] [sTDERR]at java.net.URLClassLoader$1.run(Unknown Source)

2013-01-14 20:25:04 [iNFO] [sTDERR]at java.security.AccessController.doPrivileged(Native Method)

2013-01-14 20:25:04 [iNFO] [sTDERR]at java.net.URLClassLoader.findClass(Unknown Source)

2013-01-14 20:25:04 [iNFO] [sTDERR]at org.spoutcraft.launcher.MinecraftClassLoader.findClass(MinecraftClassLoader.java:64)

2013-01-14 20:25:04 [iNFO] [sTDERR]at java.lang.ClassLoader.loadClass(Unknown Source)

2013-01-14 20:25:04 [iNFO] [sTDERR]at java.lang.ClassLoader.loadClass(Unknown Source)

2013-01-14 20:25:04 [iNFO] [sTDERR]at java.lang.Class.forName0(Native Method)

2013-01-14 20:25:04 [iNFO] [sTDERR]at java.lang.Class.forName(Unknown Source)

2013-01-14 20:25:04 [iNFO] [sTDERR]at cpw.mods.fml.relauncher.ReflectionHelper.getClass(ReflectionHelper.java:151)

2013-01-14 20:25:04 [iNFO] [sTDERR] ... 27 more

Plz help