Pb. receiving UDP datagrams

Hi,

I receive a continuous flow of UDP datagrams on my PC that I would like
to process in a Java program. I wrote the following piece of code but I
can't get any datagram (the .receive() function blocks forever). I
checked with a network sniffer - Ethereal/WireShark - and I could
verify the presence of a continuous UDP flow with valid UDP datagram
headers (destination port: 8081; checksum = 0 (none)).

Could someone help me finding out what I'm doint wrong?

Eric

PS: The piece of code:

public final class UDPClient {
    private static final Logger logger = Logger.getRootLogger();
    static byte[] buffer = new byte[65507];

    public static void main(String[] args) {
        try {
            DatagramSocket ds;
            ds = new DatagramSocket(8081);
            DatagramPacket dpi;
            dpi = new DatagramPacket(new byte[512], 512);
            while(true) {
                ds.receive(dpi);
                logger.info("UDP datagram received from " +
dpi.getAddress() + ":" + dpi.getPort());
            }
        } // end try
        catch (Exception e) {
            System.err.println(e);
        } // end catch
    }
}