HELP!!! Need help with using DOS comds from Java

I am trying to run ftp in DOS by using the following code, only its not working, when I run the program it opens the DOS window but nothing happens, it does run but returns me two the command prompt straight away. If anyone can help it would be great, thanks in advance.
import java.io.*;
class DosCmd{
public static void main(String [] args){
try{
Runtime rt = Runtime.getRuntime();
Process child = rt.exec("start ftp /c ftp 172.20.2.134");
child.waitFor();
catch(IOException io){}
catch(InterruptedException e) {}

I agree with ChuckBing,
there is no option /c for ftp as far as I know (http://www.microsoft.com/windows2000/en/server/help/ftp.htm), why don't you try "start ftp 172.20.2.134"? What should this "/c" option do?
Hope this helps,
FReAK

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