positioning/alignment Options

[akira66]

I'm trying to position my boxed xanga. I'm using this :
<DIV class="boxed" align="center" valign="middle">

and I added this to my stylesheet:
div.boxed
{overflow: auto;
width: 560px;
height: 385px;
background-color: #ffffff;
background-image: url(PLACE URL HERE);
background-position: bottom left;
background-attachment: fixed;
background-repeat: no-repeat;}

...I've tried to change the alignment but nothing happens, am i doing something wrong?