Invalid or currupt jarfile

[gta5lcpd]

mine says invalid or currupt jarfile here is my error report
---- Minecraft Crash Report ----
// Hey, that tickles! Hehehe!

Time: 2/21/13 12:27 AM
Description: Exception occured in ModLoader

java.lang.NoClassDefFoundError: forge/IMultipassRender
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(Unknown Source)
at java.security.SecureClassLoader.defineClass(Unknow n 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 java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.Class.getDeclaredFields0(Native Method)
at java.lang.Class.privateGetDeclaredFields(Unknown Source)
at java.lang.Class.getDeclaredFields(Unknown Source)
at ModLoader.setupProperties(ModLoader.java:1968)
at ModLoader.addMod(ModLoader.java:370)
at ModLoader.readFromClassPath(ModLoader.java:1285)
at ModLoader.init(ModLoader.java:908)
at ModLoader.addAllRenderers(ModLoader.java:215)
at bbu.<init>(RenderManager.java:94)
at bbu.<clinit>(RenderManager.java:14)
at net.minecraft.client.Minecraft.a(SourceFile:259)
at asq.a(SourceFile:56)
at net.minecraft.client.Minecraft.run(SourceFile:515)
at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.ClassNotFoundException: forge.IMultipassRender
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 java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
... 25 more


A detailed walkthrough of the error, its code path and all known details is as follows:
---------------------------------------------------------------------------------------

-- System Details --
Details:
Minecraft Version: 1.4.7
Operating System: Windows 7 (x86) version 6.1
Java Version: 1.7.0_11, Oracle Corporation
Java VM Version: Java HotSpot(TM) Client VM (mixed mode, sharing), Oracle Corporation
Memory: 14465080 bytes (13 MB) / 50147328 bytes (47 MB) up to 259522560 bytes (247 MB)
JVM Flags: 0 total;
AABB Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
Suspicious classes: ModLoader, ModTextureStatic, EntityRendererProxy, ...[PigbearLaser.ILaserReceiver], [PigbearLaser.Config.Version]
IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
ModLoader: Mods loaded: 2
ModLoader 1.4.7
mod_TooManyItems 1.4.7 2012-01-09

[DarrylBurke]

Removed from Java Virtual Machine Launcher problem

db

[Tolls]

java.lang.NoClassDefFoundError: forge/IMultipassRender
...
Caused by: java.lang.ClassNotFoundException: forge.IMultipassRender

You're missing a class.
What jar file that class usually exists in, who knows...you'll probably have to ask whoever wrote the code.