Modpacks not opening

[TheHead_100]

Launcher Version: 300

Operating System: Window 7 64bit

Java Version: Version 7 update 45

Antivirus Program: None

Description of Problem:

The launcher opens and everything works fine until I try to open a mod pack. Ive been trying to open Infamy Modern Warfare, Voltz, and Tekkit. With all these the bar above the, Get More Mods, button starts at 0 then just goes away. I have the console open and it all looks fine until I attempt to open a mod pack. This is what I get--

Error Messages:

java.util.zip.ZipException: error in opening zip file

at java.util.zip.ZipFile.open(Native Method)

at java.util.zip.ZipFile.<init>(Unknown Source)

at java.util.zip.ZipFile.<init>(Unknown Source)

at java.util.zip.ZipFile.<init>(Unknown Source)

at net.technicpack.launchercore.util.ZipUtils.unzipFile(ZipUtils.java:134)

at net.technicpack.launchercore.util.ZipUtils.unzipFile(ZipUtils.java:114)

at net.technicpack.launchercore.install.ModpackInstaller.installOldForgeLib(ModpackInstaller.java:107)

at net.technicpack.launchercore.install.ModpackInstaller.installOldForgeLibs(ModpackInstaller.java:96)

at net.technicpack.launchercore.install.ModpackInstaller.installPack(ModpackInstaller.java:62)

at org.spoutcraft.launcher.InstallThread.run(InstallThread.java:54)

Error Log: