BuddyPress.org

Hi guys.
I was trying to modify the profile review plugin but I have a problem when i tried to upload a photo.

Where the user submit the review, i put the standard code

<form action="file.where.the.rewviews.are.submited.php" method="post"
enctype="multipart/form-data">
<label for="file">Filename:</label>
<input type="file" name="file" id="file"><br>
<input type="submit" name="submit" value="review sumbit">
</form>

And short after the the review is sumbited i put the code of this guide.
http://www.w3schools.com/php/php_file_upload.asp
Pretty standard. But the file is not uploaded.
So what am i missing?
I tried to use that guide standalone and the images was uploaded.