Flash, php, and cookies

i can’t get my flash poll to read the php var that tests for cookies. any help? here’s my actionscript (on a movie clip):

onClipEvent(load){
cookie_lv = new LoadVars();
cookie_lv.load(“cookie.php”);
cookie_lv.onLoad = function(success:Boolean){
var cookieCheck:Number = this.checker;
if(success) {
trace("cookieCheck = " + cookieCheck);
if(cookieCheck){
content_mc.gotoAndStop(“show”);
}
}else{
trace(“didn’t work!”)
}
}
}

here’s the php:
<?php
// Check if cookie exists

if(!isset($_COOKIE['tbmpollchecker'])){
       // Set a cookie
    // Cookie name: tbmpollchecker
    // Cookie value: 
    // Cookie expire: one week
    
    setcookie ("tbmpollchecker", "cookie exists", time() + (60*60*24*7));    
    $check =  0;
}else{
    $check =  1;
}
print 'checker='.$check;

?>

here’s the output of the trace command:
cookieCheck =

//this is published as flash 6 . in flash 8, the output is
cookieCheck = undefined

so, any ideas? you can run the php at http://www.castlestudio.net/tbm/poll/cookie.php

thanks for your help!