Help with captcha

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Im trying to use a captcha script from :
http://www.boutell.com/newfaq/creating/captcha.html
I can get it to work with plan HTML forms but not with this PHP form I use.
Any help with this would be a great help.
Cheers
Chris

<?
include "header.php";
?>
<SCRIPT LANGUAGE="Javascript">
  //<!--
  // pop a windoid (Pictures)
  function popWin(url, w, h)
  {
   var madURL = url;
   var x, y, winStr;
   x=0; y=0;
   self.name="opener";
   winStr = 
"height="+h+",width="+w+",screenX="+x+",left="+x+",screenY="+y+",top="+y+",channelmode=0,dependent=0,directories=0,fullscreen=0,location=0,menubar=0,resizable=1,scrollbars=0,status=0,toolbar=0";
   lilBaby = window.open(madURL, "_blank", winStr);
  }
  //--> </script>


<?
if (!strstr($_SERVER['HTTP_REFERER'], 'teaup.me.uk')) { exit ("Invalid 
referrer");
 }
include "admin/connect.php";
$s=$_SERVER["REMOTE_ADDR"];
$ipbancheck="SELECT * from gb_banip where IP='$s'";
$ipbancheck2=mysql_query($ipbancheck);
while($ipbancheck3=mysql_fetch_array($ipbancheck2))
{
  $IPBANNED=$ipbancheck3[IP];
}
if ($IPBANNED)
    {
       print "You have been banned from posting";
    }

else
   {

    if (!isset($_POST['submit']))
    {
     print "<table border='0' cellpadding='6'><tr><td class='book'>";
     print "<form method='post' action='try.php' name='form'>";
     print "<p class=content>Name:</p> <input type='text' name='name' 
size='40'><br>";
     print "<p class=content>Country:</p><input type='text' name='country' 
size='40'><br>";
     print "<p class=content>Homepage</p><input type='text' name='homepage' 
value='http://' size='40'><br>";
     print "<p class=content>E-mail:</p><input type='text' name='email' 
size='40'><br>";
     print "<p class=content>Aim:</p><input type='text' name='aim' 
size='40'><br>";
     print "<p class=content>ICQ:</p><input type='text' name='icq' 
size='40'><br>";
     print "<p class=content>Yahoo:</p><input type='text' name='yim' 
size='40'><br>";
     print "<p class=content>MSN:</p><input type='text' name='msn' 
size='40'><br>";
     print "<p class=content>Comment:</p>";
     print "<textarea rows='6' name='comment' cols='45'></textarea><br>";

     print "<input type='submit' name='submit' value='submit'>";
     print "</form><br>";
     print "<p class='big'>Clickable Smilies</p>";
     print "<a onClick=\"addSmiley(':)')\"><img src='images/smile.gif'></a> 
";
     print "<a onClick=\"addSmiley(':(')\"><img src='images/sad.gif'></a> ";
     print "<a onClick=\"addSmiley(';)')\"><img src='images/wink.gif'></a> 
";
     print "<a onClick=\"addSmiley(';smirk')\"><img 
src='images/smirk.gif'></a> ";
     print "<a onClick=\"addSmiley(':blush')\"><img 
src='images/blush.gif'></a> ";
     print "<a onClick=\"addSmiley(':angry')\"><img 
src='images/angry.gif'></a> ";
     print "<a onClick=\"addSmiley(':shocked')\"><img 
src='images/shocked.gif'></a> ";
     print "<a onClick=\"addSmiley(':cool')\"><img 
src='images/cool.gif'></a> ";
     print "<a onClick=\"addSmiley(':ninja')\"><img 
src='images/ninja.gif'></a> ";
     print "<a onClick=\"addSmiley('(heart)')\"><img 
src='images/heart.gif'></a> ";
     print "<a onClick=\"addSmiley('(!)')\"><img 
src='images/exclamation.gif'></a> ";
     print "<a onClick=\"addSmiley('(?)')\"><img 
src='images/question.gif'></a><br>";
     print "<a onclick=\"addSmiley(':{blink}')\"><img 
src='images/winking.gif'></a>";
     print "<A onclick=\"addSmiley('{clover}')\"><img 
src='images/clover.gif'></a>";
     print "<a onclick=\"addSmiley(':[glasses]')\"><img 
src='images/glasses.gif'></a>";
     print "<a onclick=\"addSmiley(':[barf]')\"><img 
src='images/barf.gif'></a>";
     print "<a onclick=\"addSmiley(':[reallymad]')\"><img 
src='images/mad.gif'></a>";
     print "<script language=\"JavaScript\" type=\"text/javascript\">\n";
     print "function addSmiley(textToAdd)\n";
     print "{\n";
     print "document.form.comment.value += textToAdd;";
     print "document.form.comment.focus();\n";
     print "}\n";
     print "</script>\n";
     print "<br><br>";
     print "<p class='big'><A href=\"javascript:popWin('bbcode.php',400, 
5)\">BBCode instructions</a></p>";
   }




  else if (isset($_POST['submit']))
  {
    $name=$_POST['name'];
    $country=$_POST['country'];
    $email=$_POST['email'];
    $homepage=$_POST['homepage'];
    $aim=$_POST['aim'];
    $icq=$_POST['icq'];
    $yim=$_POST['yim'];
    $msn=$_POST['msn'];
    $comment=$_POST['comment'];
    if(!$name || !$comment)
    {
      print "<font color='red'>Name or comment not entered, please go back 
and sign again</font><br>";
    }
   else
    {
     $r=$_SERVER["REMOTE_ADDR"];
     $day=date("D M d, Y H:i:s");
     $timegone=date("U") ; //seconds since Jan 1st, 1970
     $putinguestbook="INSERT INTO gbook(name, country, mail, homepage, 
comment, realtime, aim, icq, yim, msn, time,IP) 
VALUES('$name','$country','$email','$homepage','$comment','$day','$aim','$icq','$yim','$msn','$timegone','$r')";
     mysql_query($putinguestbook);
     print "Thanks for posting, you will now be redirected <META HTTP-EQUIV 
= 'Refresh' Content = '2; URL =index.php'> ";
    }
  }
}
?>

</td></tr></table>

</center>
<?
include "footer.php";
?> 

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