Error in line 4?

[Anonymous]

http://www.bluegamers.com/phpform/forms/form1.html

After it you submit it says error in line 4 of this document:

<?php
$errors=0;
$error="The following errors occured while processing your form input.<ul>";
if($Title=="" || $Developer=="" || $Publisher=="" || $ReleaseDate=="" || $Genre=="" || $Length=="" || $Replayability=="" || $Difficulty=="" || $NumberofPlayers=="" || $ReviewAuthor=="" || $GameRating=="" || $ReviewIntro=="" || $Review=="" || $RentorBuy?=="" || $TodaysDate=="" || $GameIntials=="" ){
$errors=1;
$error.="<li>You did not enter one or more of the required fields. Please go back and try again.";
}
if($errors==1) echo $error;
else{
$message="Title: ".$Title."
Developer: ".$Developer."
Publisher: ".$Publisher."
Release Date: ".$ReleaseDate."
Genre: ".$Genre."
Length: ".$Length."
Replayability: ".$Replayability."
Difficulty: ".$Difficulty."
Number of Players: ".$NumberofPlayers."
Review Author: ".$ReviewAuthor."
Game Rating: ".$GameRating."
Review Intro: ".$ReviewIntro."
Review: ".$Review."
Rent or Buy?: ".$RentorBuy?."
Gamecube: ".$Gamecube."
Playstation 2: ".$Playstation2."
Gameboy Advance: ".$GameboyAdvance."
Xbox: ".$Xbox."
Cybiko: ".$Cybiko."
Todays Date: ".$TodaysDate."
Game Intials: ".$GameIntials."
";
mail("webmaster@bluegamers.com","Form Submitted at your website",$message,"From: phpFormGenerator");
$link = mysql_connect("localhost","darkness47","dragon");
mysql_select_db("Information",$link);
$query="insert into Reviews (Title,Developer,Publisher,Release,Genre,Length,Replayability,Difficulty,Players,Author,Rating,Intro,Review,Rent,Gamecube,PS2,GBA,Xbox,Cybiko,Date,Intials) values ('".$Title."','".$Developer."','".$Publisher."','".$ReleaseDate."','".$Genre."','".$Length."','".$Replayability."','".$Difficulty."','".$NumberofPlayers."','".$ReviewAuthor."','".$GameRating."','".$ReviewIntro."','".$Review."','".$RentorBuy?."','".$Gamecube."','".$Playstation2."','".$GameboyAdvance."','".$Xbox."','".$Cybiko."','".$TodaysDate."','".$GameIntials."')";
mysql_query($query);
header("Refresh: 0;url=http://www.bluegamers.com/thanku.htm");
}
?>

What is going on here????????