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So, I'm trying to use magiclauncher for mods, and the only mod I have is the more tools mod, but whenever I hit login with that mod active, I just get a black screen and this:

Any ideas? :/

*** MagicMinecraftLauncher 1.0.0 ***
Disable inactive mods
java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at magic.launcher.Launcher.main(Unknown Source)
Caused by: java.lang.IncompatibleClassChangeError: Implementing class
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(Unknown Source)
at java.security.SecureClassLoader.defineClass(Unknown 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 apa.<clinit>(SourceFile:262)
at kf.a(SourceFile:125)
at kf.<clinit>(SourceFile:58)
at net.minecraft.client.Minecraft.<init>(SourceFile:144)
at avv.<init>(SourceFile:38)
at net.minecraft.client.MinecraftApplet.init(SourceFile:38)
at net.minecraft.client.Minecraft.main(SourceFile:1672)
... 5 more

Quote from Icedcreeper

the only mod I have is the more tools mod

Quote from The »

Note:

This mod requires MinecraftForge!

Quote from Icedcreeper

Any ideas? :/

I have one...

(Hint: You need Minecraft Forge, too.)