文件上传器PHP没有'；我不工作；我不知道为什么

我的HTML FORM代码：

        <form action="upload.php" method="GET" enctyped="multipart/form-data">
            <label for="file"> Filename:</label>
            <input type="file" name="loadedFile" id="file"/></br>
            <input type="submit" name="uploadItNow" value="Submit"/>
            hai, this is this the uploader.
        </form>

PHP文件上传器脚本：

if (isset($_GET['uploadItNow'])) // checks if submit button has pressed
{
    if ($_FILES['loadedFile']["error"] > 0)
        echo "Error: ". $_FILES["loadedFile"] ["error"]. "</br>";

    else
    {
        echo "Upload: ". $_FILES["loadedFile"] ["name"]. "</br>";
        echo "Type: ". $_FILES["loadedFile"] ["type"] . "</br>";
        echo "Stored in: " .$_FILES["loadedFile"] ["tmp_name"];
        echo "Size: ". ($_FILES["loadedFile"] ["size"] / 1024). " Kb</br>";
        //Copies file from TEMP_PHP dir to d.default dir
        if (file_exists("." . $_FILES["loadedFile"]["name"]))
        {
            echo $_FILES["loadedFile"]["name"] . " already exists. ";
        }
        else
        {
            move_uploaded_file($_FILES["loadedFile"]["tmp_name"],"." . $_FILES["loadedFile"]["name"]);
            echo "Stored in: " . "upload/" . $_FILES["loadedFile"]["name"];
        }
    }
} 

由于某种原因，它不起作用，我的纸条一直转到这个代码：

echo $_FILES["loadedFile"]["name"] . " already exists. ";