Cannot insert file into database. What's wrong?

Greetings all,
I'm trying to write a CMS for a photo gallery, and I worked out that the best way would be to upload the images to a directory and have a mysql table to store the relative location of the images for later use.

I have 1 problem, which I believe causes the file not to be uploaded.

<?php
session_start();
ini_set('display_errors',1);
error_reporting(E_ALL|E_STRICT);
include('../functions2.php');
include('dbconfig.php');


$file=$_POST['upload'];
if ($_SESSION['loggedIn']==1)
{
	if (isset($file))
	{
		$conn=mysql_connect($host,$username,$password) or die(mysql_error());
		mysql_select_db("$db_name")or die("cannot select DB");
		$uploadDate=date("d/m/y : H:i:s", time());
		
		$target_path = "../gallery/";
		$target_path = $target_path . basename($_FILES['photo']['name']);
		$galleryId=$_POST['photoGallery'];
		
		if(move_uploaded_file($_FILES['photo']['tmp_name'], $target_path))
		{
			$sql="INSERT INTO tblPhotoGallery (galleryId, location, uploadDate, show) VALUES ('$galleryId','$target_path','$uploadDate','1')";
			echo $sql;
			mysql_query($sql) or die(mysql_error());
		}
	}
	
	else
	{
		echo "No upload";
	}
	?>
	
	<a href="gallery.php">Image Gallery</a>
    <table bgcolor="#FFFF99">
    <tr bgcolor="#FFFFCC"><td>Select</td><td>Name</td><td>Gallery</td><td>Upload Date</td></tr>
    <?php
	$conn=mysql_connect($host,$username,$password) or die(mysql.error());
	mysql_select_db("$db_name")or die("cannot select DB");
	$sql="SELECT * FROM tblPhotoGallery,tblGallery ORDER BY pictureId";
	$result=mysql_query($sql);
	
	$row=mysql_fetch_array($result);
	while($row = mysql_fetch_array($result))
	{?>
		<tr><td><?php echo $row['show']; ?></td><td><?php echo $row['name']; ?></td><td><?php echo $row['uploadDate']; ?></td></tr>
    <?php	
	}
	?>
    </table>
    <h1>Upload Picture</h1>
    <form action="gallery.php" method="post" enctype="multipart/form-data">
    <input type="hidden" name="MAX_FILE_SIZE" value="10000000" />
    <label for="photo">Select file:</label><input type="file" name="photo" id="photo" />
    <label for="photoGallery">Gallery:</label><select name="photoGallery">
	<?php
	$sql2="SELECT * FROM tblgallery ORDER BY galleryId";
	$result2=mysql_query($sql2);
	$row2=mysql_fetch_array($result);
	while($row2 = mysql_fetch_array($result2))
	{
		print '<option value="'.$row2['galleryId'].'">'.$row2['name'].'</option>';
    }
	?>
    </select>
    <input type="submit" name="upload" value="Upload photo"/>
    </form>
<?php	
}
?>

Error:

Notice: Undefined index: upload in C:\Program Files\Apache Software Foundation\Apache2.2\htdocs\newsite\admin\gallery.php on line 9

So basicly, the CMS is in the /admin folder, and I would like the images stored in the /gallery folder.

What do I need to do to fix this undefined index?