<table cellspacing="5">
<tr id="header">
<td id="headerlogo"><a href="http://www.theeclub.com/"><img class="bannerimg" src="http://www.theeclub.com/themes/default/Eclub logo_transp.gif" width="204" height="52" alt="" /></a></td>
<td id="headerbanner"><a href="http://www.kqzyfj.com/click-1687296-10293996" target="_top" >
<img src="http://www.afcyhf.com/image-1687296-10293996" width="468" height="60" alt="Click here for instant community" border="0"></a></td>
</tr>
<tr>
<td id="headerbar" colspan="2">&nbsp;</td>
</tr>
</table>

in the above you are using 3 diff classes with your table.
i could not find "headerlogo" in your style.css, but did find "headerbanner" in any case all you have to do is adjust the height of the td(s)

add this to your #headerbanner "height: 70px;" or your preferred height

and
define td#headerlogo

td#headerlogo {
height: 70px;
}

you could also do this other ways such as adding padding to the above classes. do not forget to remove cellspacing once you have this corrected.