File UPload? What's WRONG?!

[sodascape]

[b]What is wrong with this script?  It keeps spitting out, "Your File Could NOt Be Uplaoded Because:     [/b]

[code] <?php
// IMAGE UPLOAD FUNCTION
function createThumbnail($imageDirectory, $imageName, $thumbDirectory, $thumbWidth)
{
$srcImg = imagecreatefromjpeg("$imageDirectory/$imageName");
$origWidth = imagesx($srcImg);
$origHeight = imagesy($srcImg);

$ratio = $thumbWidth / $origWidth;
$thumbHeight = $origHeight * $ratio;

$thumbImg = imagecreatetruecolor($thumbWidth, $thumbHeight);

imagecopyresampled($thumbImg, $srcImg, 0, 0, 0, 0, $thumbWidth, $thumbHeight, $origWidth, $origHeight);
imagejpeg($thumbImg, "$thumbDirectory/$imageName");
}
// END IMAGE UPLOAD FUNCTION


$done = 'false';

if (isset($_POST['upload'])) {

// IMAGE UPLOAD
if (move_uploaded_file ($_FILES['picture1']['tmp_name'], "picpost/{$_FILES['picture1']['name']}")) {

} else {

echo '<p>Your file could not be uploaded because:</p>';

switch ($_FILES['picture1']['error']) {
case 1:
echo 'Your file is bigger than what the server can hold!';
break;
case 2:
echo 'Your file is too big!';
break;
case 3:
echo 'Only part of the file was uploaded!';
break;
case 4:
echo 'No file was uploaded.';
break;
}
exit();
}// End If Move Uploaded File

$fileName = $_FILES['picture1']['name'];

    if(!get_magic_quotes_gpc()) {
           $fileName = addslashes($fileName);
    } // end get_magic_quotes_gpc


// CALL THE FUNCTION TO CREATE THUMBNAIL
createThumbnail("picpost", "$fileName", "picpost/thumbs", 100);
$done = 'true';

} // END OF THE IMAGE UPLOAD

?>




<form method="post" action="upload.php">
<input type="file" name="picture1" />
<input type="submit" name="upload" />
</form>[/code]