Your <body> has a closing tag in the wrong place. You might be breaking it by having the / at the end.
<body style="background-image:url(C:\Documents and Settings\Administrator\My Documents\HTML BASICS\html unprinted\my web docs\Pictures\web page backgrounds\b4.jpg);">
<!-- Copy -->
Also, as noted before, this will only work locally. If you are trying to place this online it will not work since the file is stored on your computer and not on your chosen web server.
Hope this helps,