trouble running my first java program

here is the code which i saved as C:\OurFirstProgram.java:

import java.lang.System;

public class OurFirstProgram

{

public static void main(String[] args)

{

System.out.println("TESTING");

}

}

next i ran javac C:\OurFirstProgram.java

finally i ran java C:\OurFirstProgram

and it returned "Exception in thread "main" java.lang.NoClassDefFoundError: C\OurFirstProgram.

Do you know what is wrong and how i can fix it. I installed JDK 1.3.1

[528 byte] By [bunchofpixels] at [2007-9-26 4:21:00]