Please Help with error!

I am using a wordpress photo gallery plugin and I am receiving the following error when I upload a photo.

Warning: getimagesize() [function.getimagesize]: Filename cannot be empty in /home/******/public_html/alr/wp-content/plugins/wp-photo-album/wppa.php on line 651

The .php file info is below.

// check if thumbs dir exists
if (!is_dir($wppa_dir . '/thumbs')) {
mkdir($wppa_dir . '/thumbs');
}

foreach ($_FILES as $file) {
Line 651 if (getimagesize($file['tmp_name'])) {
$ext = substr(strrchr($file['name'], "."), 1);

$query = "INSERT INTO " . PHOTO_TABLE . " (id, album, ext, name, description) VALUES (0, {$_POST['wppa-album']}, '$ext', '{$file['name']}', '')";
$wpdb->query($query);
//echo $query;
$image_id = $wpdb->get_var("SELECT LAST_INSERT_ID()");

$newimage = $wppa_dir . '/' . $image_id . '.' . $ext;
copy($file['tmp_name'], $newimage);

if (is_file ($newimage)) {
$uploaded_a_file = TRUE;
if (is_numeric(get_option('wppa_thumbsize'))) {
$thumbsize = get_option('wppa_thumbsize');
} else {
$thumbsize = 130;
}

wppa_create_thumbnail($newimage, $thumbsize, '' );
}
}
}

if ($uploaded_a_file) { echo '<div id="message" class="updated fade"><p><strong>Photos Uploaded.</strong></p></div>'; }

}

Can someone please tell me how to fix this?

 

all I can say that variable $file['tmp_name'] is giving an empty value...