i have an issue with some coding

<table width="760" border="0" align="center" cellpadding="0" cellspacing="0" style="background-attachment: fixed; background-image:url(themes/oranje/images/bg_neon.gif); ">
<tr>
<td width="760" valign="top" align="center">
{CUSTOM_HEADER}
</td>
</tr>
<tr><td height="1" align="center"><img src="themes/oranje/images/black_spacer.gif" width="758" height="1" border="0" alt="" /></td></tr>
<tr>
<td width="760" valign="top" align="center" style="padding-right:10px; background-repeat: no-repeat; background-position: center left; background-image:url(themes/oranje/images/neo-logo.gif);">


i want the fixed style bg as it looks more professional to me... and well i got it working on the body just cant get to work on the main table (i can get the graphic, just not for it to be fixed, rather then the default scroll that its at by defualt)...

pls help