Help with simple remote login please

[jiffy]

Hi I just recently bought an existing site/forum and it had a login for the forums on the main homepage. It worked fine but now it doesn't work. Can someone take a look at this code and let me know why it doesn't work?

<!-- Member Login Table -->
<form action="http://www.tlplanet.com/forums/login.php" method="post">
<input type="hidden" name="s" value="$session[sessionhash]">
<input type="hidden" name="action" value="login">
<table width="130" border=0 cellpadding=2 cellspacing=0 >
<tr>
<td valign=top>
<table width=100% border=1 bordercolor="#2E3192" align=center cellpadding=6 cellspacing=0 class=BordeCeldasMenu>
<tr>
<td class=MenuSection align=center><b>MEMBER LOGIN</b></td>
</tr>
<tr>
<td><table align="center" width="85%" cellspacing="0" cellpadding="0" border="0">
<tr>
<td height="5"><img src="images/ssp-shim.gif" width="1" height="5" border="0"></td>
</tr>
<tr>
<td align="center"><span class="SteveText">username</span><br>
<input type="text" class="bginput" name="username" size="9"></td>
</tr>
<tr>
<td align="center"><span class="SteveText">password</span><br>
<input type="password" class="bginput" name="password" size="9"></td>
</tr>
<tr>
<td align="center"><img src="images/shim.gif" height="5" alt="" border="0"><br><br><input type="submit" class="bginput" value="Login!"><p><span>Not registered?</span><br><a href="http://www.tlplanet.com/forums/register.php" class="menu" target="_top">Register now!</a></span></p></td>

</tr>
</table>
</td>
</tr>
</table>
</td>
</tr>
</table>
</form>
<!-- */Member Login Table -->