I can't download and use modpacks

[nananananacat]

Launcher Version: 242

Operating System: Windows XP Home Edition 32-Bit

Java Version: JRE 7

Antivirus Program: Windows Firewall

Description of Problem:

It tries to download and extract, but when it gets to the extraction part, it shows a negative percent extracted (example:-24398544654%). It doesn't crash, but it loads without mods. When I went and checked on the .zip file it downloaded in the .technic/shapeshifterz/temp/ , it said it was Corrupt or Invalid. I then tried multiple other mods, but they all turned out the same way. Also, can someone tell me how to manually install mods, just in-case.

Error Messages:

FROM CONSOLE:

Loaded face

Starting download of http://skins.technicpack.net/helm/TDWLollipop/100, with 3 tries remaining

Starting download of http://mirror.technicpack.net/Technic/lib/windows_natives.jar, with 3 tries remaining

Expected MD5: 92431FBF5355862F9C16D0BA8193691D Calculated MD5: 92431fbf5355862f9c16d0ba8193691d

Starting download of http://www.planetminecraft.com/mod/shape-shifter-1736589/, with 3 tries remaining

May 28, 2013 3:28:19 PM org.spoutcraft.launcher.UpdateThread updateModpack

SEVERE: An error occurred while extracting file: C:\Documents and Settings\Cherokee-Cheyanne\Application Data\.technic\shapeshifterz\temp\shapeshifterz-1.5.1.zip

May 28, 2013 3:28:19 PM org.spoutcraft.launcher.UpdateThread updateModpack

SEVERE: An error occurred while extracting file: C:\Documents and Settings\Cherokee-Cheyanne\Application Data\.technic\shapeshifterz\temp\shapeshifterz-1.5.1.zip

net.lingala.zip4j.exception.ZipException: zip headers not found. probably not a zip file

at net.lingala.zip4j.core.HeaderReader.readEndOfCentralDirectoryRecord(HeaderReader.java:122)

at net.lingala.zip4j.core.HeaderReader.readAllHeaders(HeaderReader.java:78)

at net.lingala.zip4j.core.ZipFile.readZipInfo(ZipFile.java:425)

at net.lingala.zip4j.core.ZipFile.extractAll(ZipFile.java:475)

at net.lingala.zip4j.core.ZipFile.extractAll(ZipFile.java:451)

at org.spoutcraft.launcher.UpdateThread.updateModpack(UpdateThread.java:440)

at org.spoutcraft.launcher.UpdateThread.runTasks(UpdateThread.java:140)

at org.spoutcraft.launcher.UpdateThread.run(UpdateThread.java:113)

java.io.FileNotFoundException: C:\Documents and Settings\Cherokee-Cheyanne\Application Data\.technic\shapeshifterz\bin\modpack.jar (The system cannot find the file specified)

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.jar.JarFile.<init>(Unknown Source)

at java.util.jar.JarFile.<init>(Unknown Source)

at org.spoutcraft.launcher.launch.MinecraftClassLoader.index(MinecraftClassLoader.java:90)

at org.spoutcraft.launcher.launch.MinecraftClassLoader.<init>(MinecraftClassLoader.java:68)

at org.spoutcraft.launcher.launch.MinecraftLauncher.getClassLoader(MinecraftLauncher.java:60)

at org.spoutcraft.launcher.UpdateThread.runTasks(UpdateThread.java:162)

at org.spoutcraft.launcher.UpdateThread.run(UpdateThread.java:113)

java.io.FileNotFoundException: C:\Documents and Settings\Cherokee-Cheyanne\Application Data\.technic\shapeshifterz\bin\modpack.jar (The system cannot find the file specified)

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.jar.JarFile.<init>(Unknown Source)

at java.util.jar.JarFile.<init>(Unknown Source)

at org.spoutcraft.launcher.launch.MinecraftClassLoader.index(MinecraftClassLoader.java:90)

at org.spoutcraft.launcher.launch.MinecraftClassLoader.<init>(MinecraftClassLoader.java:78)

at org.spoutcraft.launcher.launch.MinecraftLauncher.getClassLoader(MinecraftLauncher.java:60)

at org.spoutcraft.launcher.UpdateThread.runTasks(UpdateThread.java:162)

at org.spoutcraft.launcher.UpdateThread.run(UpdateThread.java:113)

Error Log:

(Can't post, says message is too long.)