[big dig not installing]

when my big dig kept crashing i decided to reinstall my technic,

however now it refuses to install the modpack, no error messages turn up or anything.

i tried to reinstall again but that didn't work, other modpack do download

i have windows 7 abd the latest java

the console says:

java.util.zip.ZipException: invalid code lengths set

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:108)

at net.technicpack.launchercore.install.ModpackInstaller.installOldForgeLibs(ModpackInstaller.java:97)

at net.technicpack.launchercore.install.ModpackInstaller.installPack(ModpackInstaller.java:61)

at org.spoutcraft.launcher.InstallThread.run(InstallThread.java:56)