My minecraft keeps crashing?

I'm not to big on this stuff and i have removed meta.inf but i got the fossils and archaeologist mod and it keeps crashing i have 6gb ram so it shouldnt and i just ran a anti virus thing here is the crash report please help: ---- Minecraft Crash Report ----
// Why is it breaking.

Time: 2/9/14 1:26 AM
Description: Initializing game

java.lang.NoClassDefFoundError: apa
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Unknown Source)
at cpw.mods.fml.common.FMLModContainer.cons…
at sun.reflect.NativeMethodAccessorImpl.inv… Method)
at sun.reflect.NativeMethodAccessorImpl.inv… Source)
at sun.reflect.DelegatingMethodAccessorImpl… Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at com.google.common.eventbus.EventHandler…
at com.google.common.eventbus.SynchronizedE…
at com.google.common.eventbus.EventBus.disp…
at com.google.common.eventbus.EventBus.disp…
at com.google.common.eventbus.EventBus.post…
at cpw.mods.fml.common.LoadController.sendE…
at cpw.mods.fml.common.LoadController.propo…
at sun.reflect.NativeMethodAccessorImpl.inv… Method)
at sun.reflect.NativeMethodAccessorImpl.inv… Source)
at sun.reflect.DelegatingMethodAccessorImpl… Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at com.google.common.eventbus.EventHandler…
at com.google.common.eventbus.SynchronizedE…
at com.google.common.eventbus.EventBus.disp…
at com.google.common.eventbus.EventBus.disp…
at com.google.common.eventbus.EventBus.post…
at cpw.mods.fml.common.LoadController.distr…
at cpw.mods.fml.common.Loader.loadMods(Load…
at cpw.mods.fml.client.FMLClientHandler.beg…
at net.minecraft.client.Minecraft.func_7138…
at net.minecraft.client.Minecraft.func_9999…
at net.minecraft.client.main.Main.main(Sour…
at sun.reflect.NativeMethodAccessorImpl.inv… Method)
at sun.reflect.NativeMethodAccessorImpl.inv… Source)
at sun.reflect.DelegatingMethodAccessorImpl… Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at net.minecraft.launchwrapper.Launch.launc…
at net.minecraft.launchwrapper.Launch.main(…
Caused by: java.lang.ClassNotFoundException: apa
at net.minecraft.launchwrapper.LaunchClassL…
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
… 35 more
Caused by: java.lang.NullPointerException
at net.minecraft.launchwrapper.LaunchClassL…
… 37 more

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

-- Head --
Stacktrace:
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Unknown Source)
at cpw.mods.fml.common.FMLModContainer.cons…
at sun.reflect.NativeMethodAccessorImpl.inv… Method)
at sun.reflect.NativeMethodAccessorImpl.inv… Source)
at sun.reflect.DelegatingMethodAccessorImpl… Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at com.google.common.eventbus.EventHandler…
at com.google.common.eventbus.SynchronizedE…
at com.google.common.eventbus.EventBus.disp…
at com.google.common.eventbus.EventBus.disp…
at com.google.common.eventbus.EventBus.post…
at cpw.mods.fml.common.LoadController.sendE…
at cpw.mods.fml.common.LoadController.propo…
at sun.reflect.NativeMethodAccessorImpl.inv… Method)
at sun.reflect.NativeMethodAccessorImpl.inv… Source)
at sun.reflect.DelegatingMethodAccessorImpl… Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at com.google.common.eventbus.EventHandler…
at com.google.common.eventbus.SynchronizedE…
at com.google.common.eventbus.EventBus.disp…
at com.google.common.eventbus.EventBus.disp…
at com.google.common.eventbus.EventBus.post…

Added (1). forge

Drake Wilson

Did you use forge or mod loader to download this? That usually helps me install mods easily with no hassle. Or possibly you need to just download the newest launcher and install it on there if there's one. Hope this helps!

Burgess

Try removing one of the mods you said you had installed. Either the mod has a glitch or then the two mods are not even comparible with each other. When you figure out which mod caused the crash, contact the mod maker so he/she can fix it.

Baka