[Tekkit Not Starting]

i keep getting

java.util.zip.ZipException: invalid literal/length code

at java.util.zip.InflaterInputStream.read(Unknown Source)

at java.io.BufferedInputStream.fill(Unknown Source)

at java.io.BufferedInputStream.read1(Unknown Source)

at java.io.BufferedInputStream.read(Unknown Source)

at net.technicpack.launchercore.util.ZipUtils.unzipEntry(ZipUtils.java:104)

at net.technicpack.launchercore.util.ZipUtils.unzipFile(ZipUtils.java:150)

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

at net.technicpack.launchercore.install.ModpackInstaller.installOldForgeLib(ModpackInstaller.java:105)

at net.technicpack.launchercore.install.ModpackInstaller.installOldForgeLibs(ModpackInstaller.java:94)

at net.technicpack.launchercore.install.ModpackInstaller.installPack(ModpackInstaller.java:60)

at org.spoutcraft.launcher.InstallThread.run(InstallThread.java:50)