Life Universe and all SPOJ Java

I'm new to SPOJ and just getting started with the first problem, Life, Universe and all ... When I post I always see a compilation error. I don't see any error message when I click on the error link. I don't see any compilation error on my system. I see no errors in IDEONE. When I upload my solution, I see an empty java file.

What am I missing?

Here is an example link for my solution

Error link

Here is my code below in java

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.IOException;

public class Main {    
    public static void main(String[] args) {
        try{
            BufferedReader buf = new BufferedReader( new InputStreamReader( System.in ));
            String line ;
            while(  (line = buf.readLine()) != null ){
                if(!line.equals("42")){
                    System.out.println(line);
                }else{
                    break;
                }
            }
        }catch(IOException e){
            System.out.println(e.toString());
        }catch(Exception e){
            System.out.println(e.toString());
        }

    }

}