Newbie scripter needs advice.

[xuntasi]

I am very new to scripting and need help. This is the first script I've ever made and it doesn't work. What is wrong with this script? for some reason when I put the sleep() command in there it makes that player.chat variable command not work correctly.

PHP Code:

function onPlayerChats()
{
  if(player.chat=="You are the most amazing NPC ever.")
  {
    message That I am.;
    sleep(3);
    message(null);
  }
  else
  {
    message Shut up, no one cares.;
    sleep(1);
    player.chat="Ok...";
    sleep(1);
    message That's right.;
    sleep(3);
    message(null);
  }
}