I just downloaded forge so I could use the Mo' Animals Mod. I use MagicLauncher to manage my mods, and it told me a forge was required, so I downloaded MCforge and added it to my list of active mods. Now, whenever I have it enabled, my game crashes upon startup. Could Someone please help me with this? 
  
Error report: 
  
*** MagicMinecraftLauncher 0.9.9 *** 
java.lang.VerifyError: (class: net/minecraft/client/Minecraft, method: usePortal signature: (ILox;)V) Incompatible argument to function 
    at java.lang.Class.getDeclaredMethods0(Native Method) 
    at java.lang.Class.privateGetDeclaredMethods(Unknown Source) 
    at java.lang.Class.getMethod0(Unknown Source) 
    at java.lang.Class.getMethod(Unknown Source) 
    at magic.launcher.Launcher.main(Unknown Source)