JAVA ClassNotFound error

So, I was just started formulating a mod for a couple friends and I to use while playing Minecraft. A small problem occurred right after trying to run Minecraft after simply setting up some proxies and a single item. I dont quite know what is happening as such I am asking. Any help is greatly appreciated.
Oh and here's the crash report on paste bin: http://pastebin.com/NsagHztb

The problem is the JVM cannot find the class com.*****.*****.ClientProxy.java on the classpath.

Java ClassNotFoundExceptions are generally caused by one of three things:

  1. You are missing a jar that contains the ClientProxy class.
  2. Your classpath is not configured correctly and is missing the class or jar file containing the class.
  3. You have an old/wrong version of one of your jar files.