SSI command rules:

<ul>
<li>Commands and arguments are in lowercase letters </li>
<li>The double quotes around the value are required</li> 
<li>There is no space until after the command </li>
<li>That hash mark (#) is required </li>
<li>There is a space after the second double quote, before the second double hyphen (at the end) </li>
</ul>