Hey my CSS isnt working when i enter it but other CSSes work

Im using this tutorial to make my CSS:
https://www.lioden.com/topic.php?id=304429485172

the thing I'm using:
<*link rel=""stylesheet" type="text/css" href="https://dl.dropbox.com/s/CODE HERE" */>

What I'm entering to my territory:
<*link rel=""stylesheet" type="text/css" href="https://www.dropbox.com/s/xyhi40v8wr5fgo3/css.css?dl=0" */>

Is there something I'm doing wrong?