Connecting Sick Laserscanner over ethernet to arduino


We have a problem with contecting a sensor(Sick laserscanner LMS111 over ethernet to the arduino mega 2560. We load the sketch sendandreceve in the arduino with the correct mac address of the Ethernet shield. I think that the problem is dat the Laserscanner not continu data send to the arduino. In the sketch listen the arduino alone. We soud bij alone to ping to the arduino for sending data.

does anyone know how we can fix it?

thanks for reading

In the meanwhile we succeeded to ping to our laser scanner from arduino. So we can connection between the two devices. Now we have to send a message to our laser scanner so that he start sending data to arduino. Does anybody have an idea how we can do that? The message that should be send is:
Request: sMN{SPC}LMCstopmeas
HEX string: 02 73 4D 4E 20 4C 4D 43 73 74 6F 70 6D 65 61 73 03
Ping code:

  Ping Example
 This example repeatedly sends ICMP pings and sends the result over the serial port.
 * Ethernet shield attached to pins 10, 11, 12, 13
 created 30 Sep 2010
 by Blake Foster

#include <SPI.h>         
#include <Ethernet.h>
#include <ICMPPing.h>

byte mac[] = {0x90, 0xA2, 0xDA, 0x0D, 0x21, 0x19}; // max address for ethernet shield
byte ip[] = { 169,254,228,218}; // ip address for ethernet shield
byte pingAddr[] = {169,254,228,219}; // ip address to ping

SOCKET pingSocket = 0;

char buffer [256];

void setup() 
  // start Ethernet
  Ethernet.begin(mac, ip);

void loop()
  ICMPPing ping(pingSocket);
  ping(4, pingAddr, buffer);

thanks for reading

I would like to read the data using Arduino. I have no idea how to read the data via the Internet.