Welcome message on main page still shows after users click register

[Chmura]

I have a welcome and registration message on my forums main page for unregistered users in header, but after users click register the message still shows how do I make it disappear at the rules and registration page? or just get it to show on the main page

<if condition="$show['guest']">
<!-- guest welcome message -->
<table width="980" border="0" align="center" cellpadding="0" cellspacing="5" style="background:#ECECEC; border:1px solid #CFCFCF;">
  <tr>
    <td valign="top"><table width="100%" border="0" cellspacing="5" cellpadding="0" style="background:#ffffff; border:1px solid #DDDDDD;">
      <tr>
        <td style="font-size:22px; font-weight:bold; color:#40759F; font-family:Arial, Helvetica, sans-serif;">WELCOME...</td>
      </tr>
      <tr>
        <td style="font-family:Arial, Helvetica, sans-serif; font-size:14px; text-align:justify;">Welcome to the Internet's community blah blah</td>
      </tr>
    </table></td>
  </tr>
</table>
<!-- / guest welcome message -->
</if>

--------------- Added [DATE]1235506040[/DATE] at [TIME]1235506040[/TIME] ---------------

anyone?