Hmmm,
That doesn't work. I'm assuming that PHP thinks that the # means you want to start your comment. I get a parsing error, because the semicolon is in the comment...
Edit: Here is the code I have...
echo "<tr><td width=\"100%\" bgcolor=\"#FF9900\"><font color=\"#330066\" face=\"arial\" size=\"2\"><b>".$_POST['subject']</b></font></td></tr>";