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I use magic launcher to run my mods. I currently am running magic launcher on 1.1.7 and Minecraft Version 1.5.2

I'm trying to use the mods Thaumcraft 3.0.5h, and Soul Shards mod 1.5.1. I have run the soul shards mod before so i know it works, but the problem is with the forge. Currently, I am trying to run to run the forge version: 1.5.2-7.8.1.737. The full name of the doc is minecraftforge-1.5.2-7.8.1.737 and is downloaded directly from the forge mod loader site. It's the universal version and both of my mods are below the minecraft forge mod. However i keep getting the error message:

InactiveExtMods: Soul-Shards-Mod-1.5.2 (1).jar
MainClass: net.minecraft.client.Minecraft
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 magic.launcher.Launcher.main(Unknown Source)

Note: I do not have optifine and I still have the default configuration.