I keep getting a "Can't find main class. Program will exit".

This is what I have:

Copy.java has been compiled to copy.class. Here is the source code:

import java.io.*;
public class Copy {
   public static void main(String[] args) throws IOException {
      File inputFile = new File("text.txt");
      File outputFile = new File("outagain.txt");
      FileReader in = new FileReader(inputFile);
      FileWriter out = new FileWriter(outputFile);
      int c;
      while ((c = in.read()) != -1)
I wrote a custom manifest file that has these lines of code:

Manifest-version: 1.0
Main-Class: Copy
Created-By: 1.4.2_09 (Sun Microsystems Inc.)

I used windows command line to compile, using this:
jar cmf c:\Manifest.mf c:\Copy.jar C:\Copy.class

Please help!