Technic launcher freezes when downloading modpack

[souper123]

I made a modpack, and when I run it the Launcher freezes on the last file it needs to download and wont do anything. I made my modpack like all of my other modpacks and they don't have the problem. It isn't the mods, because I remove all of those. HELP!!!

Error:

java.lang.SecurityException: Invalid signature file digest for Manifest main attributes

at sun.security.util.SignatureFileVerifier.processImpl(Unknown Source)

at sun.security.util.SignatureFileVerifier.process(Unknown Source)

at java.util.jar.JarVerifier.processEntry(Unknown Source)

at java.util.jar.JarVerifier.update(Unknown Source)

at java.util.jar.JarFile.initializeVerifier(Unknown Source)

at java.util.jar.JarFile.getInputStream(Unknown Source)

at org.spoutcraft.launcher.launch.MinecraftClassLoader.findClassInjar(MinecraftClassLoader.java:160)

at org.spoutcraft.launcher.launch.MinecraftClassLoader.findClass(MinecraftClassLoader.java:143)

at java.lang.ClassLoader.loadClass(Unknown Source)

at java.lang.ClassLoader.loadClass(Unknown Source)

at org.spoutcraft.launcher.launch.MinecraftLauncher.setMinecraftDirectory(MinecraftLauncher.java:110)

at org.spoutcraft.launcher.launch.MinecraftLauncher.getMinecraftApplet(MinecraftLauncher.java:86)

at org.spoutcraft.launcher.GameLauncher.runGame(GameLauncher.java:133)

at org.spoutcraft.launcher.GameUpdater.runGame(GameUpdater.java:81)

at org.spoutcraft.launcher.skin.LoginFrame.onEvent(LoginFrame.java:300)

at org.spoutcraft.launcher.skin.LoginWorker.doInBackground(LoginWorker.java:102)

at org.jdesktop.swingworker.SwingWorker$1.call(Unknown Source)

at java.util.concurrent.FutureTask$Sync.innerRun(Unknown Source)

at java.util.concurrent.FutureTask.run(Unknown Source)

at org.jdesktop.swingworker.SwingWorker.run(Unknown Source)

at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)

at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)

at java.lang.Thread.run(Unknown Source)

org.spoutcraft.launcher.exceptions.UnknownMinecraftException

at org.spoutcraft.launcher.launch.MinecraftLauncher.getMinecraftApplet(MinecraftLauncher.java:99)

at org.spoutcraft.launcher.GameLauncher.runGame(GameLauncher.java:133)

at org.spoutcraft.launcher.GameUpdater.runGame(GameUpdater.java:81)

at org.spoutcraft.launcher.skin.LoginFrame.onEvent(LoginFrame.java:300)

at org.spoutcraft.launcher.skin.LoginWorker.doInBackground(LoginWorker.java:102)

at org.jdesktop.swingworker.SwingWorker$1.call(Unknown Source)

at java.util.concurrent.FutureTask$Sync.innerRun(Unknown Source)

at java.util.concurrent.FutureTask.run(Unknown Source)

at org.jdesktop.swingworker.SwingWorker.run(Unknown Source)

at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)

at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)

at java.lang.Thread.run(Unknown Source)

Caused by: org.spoutcraft.launcher.exceptions.MinecraftVerifyException: Cannot set directory in Minecraft class

at org.spoutcraft.launcher.launch.MinecraftLauncher.setMinecraftDirectory(MinecraftLauncher.java:130)

at org.spoutcraft.launcher.launch.MinecraftLauncher.getMinecraftApplet(MinecraftLauncher.java:86)

... 11 more

Caused by: java.lang.SecurityException: Invalid signature file digest for Manifest main attributes

at sun.security.util.SignatureFileVerifier.processImpl(Unknown Source)

at sun.security.util.SignatureFileVerifier.process(Unknown Source)

at java.util.jar.JarVerifier.processEntry(Unknown Source)

at java.util.jar.JarVerifier.update(Unknown Source)

at java.util.jar.JarFile.initializeVerifier(Unknown Source)

at java.util.jar.JarFile.getInputStream(Unknown Source)

at sun.misc.URLClassPath$JarLoader$2.getInputStream(Unknown Source)

at sun.misc.Resource.cachedInputStream(Unknown Source)

at sun.misc.Resource.getByteBuffer(Unknown Source)

at java.net.URLClassLoader.defineClass(Unknown Source)

at java.net.URLClassLoader.access$100(Unknown Source)

at java.net.URLClassLoader$1.run(Unknown Source)

at java.net.URLClassLoader$1.run(Unknown Source)

at java.security.AccessController.doPrivileged(Native Method)

at java.net.URLClassLoader.findClass(Unknown Source)

at org.spoutcraft.launcher.launch.MinecraftClassLoader.findClass(MinecraftClassLoader.java:149)

at java.lang.ClassLoader.loadClass(Unknown Source)

at java.lang.ClassLoader.loadClass(Unknown Source)

at org.spoutcraft.launcher.launch.MinecraftLauncher.setMinecraftDirectory(MinecraftLauncher.java:110)

... 12 more