"The used command is not allowed with this MySQL version" on LOAD DATA LOCAL INFILE on a shared server

I use 1&1 shared hosting on which I have a MySQL DB. I needed to load a CSV file into a table on the database and I used the PHP script below to successfully load it yesterday. (variables are all defined in the script but left out for obvious reasons). Today I deleted the data out of the table and tried to run the same script to upload the exact same file and I got the following errer:

"Fatal error: Uncaught exception 'PDOException' with message 'SQLSTATE[42000]: Syntax error or access violation: 1148 The used command is not allowed with this MySQL version' in /homepages/1/d23232323/htdocs/importd.php:32 Stack trace: #0 /homepages/1/d23232323/htdocs/importd.php(32): PDO->exec('? LOAD DATA ...') #1 {main} thrown in /homepages/1/d23232323/htdocs/importd.php on line 32"

Everything I find on the web says I need to change configuration settings in MySQL, the problem is: 1. I don't think I have access to these settings on a shared server and 2. It worked fine yesterday.
Can anyone think of a reason why this would happen all of a sudden and what I could possibly do to remedy it?

if(!file_exists($csvfile)) {
    die("File not found. Make sure you specified the correct path.");
}

try {
    $pdo = new PDO("mysql:host=$databasehost;dbname=$databasename", 
        $databaseusername, $databasepassword,
        array(
            PDO::MYSQL_ATTR_LOCAL_INFILE => true,
            PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION
        )
    );
} catch (PDOException $e) {
    die("database connection failed: ".$e->getMessage());
}

$affectedRows = $pdo->exec("
    LOAD DATA LOCAL INFILE ".$pdo->quote($csvfile)." INTO TABLE `$databasetable`
      FIELDS TERMINATED BY ".$pdo->quote($fieldseparator)."
  OPTIONALLY ENCLOSED BY ".$pdo->quote($fieldenclosed)."
	  LINES TERMINATED BY ".$pdo->quote($lineseparator));

echo "Loaded a total of $affectedRows records from this csv file.\n";

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