It's in default.asp
Check near the top where the code for the table starts I believe there is a place that inserts a space in there.
Here is a view source of your page:
<body topmargin="0" leftmargin="0" marginwidth="0" marginheight="0">
<table border=0 width="648" cellspacing=0 cellpadding=0 align=center>
<tr>
<td>
</td>
</tr>
<tr>
<td bgcolor="midnightblue">
<table border=0 width="648" cellspacing=1 cellpadding=4>
The code that is causing the space is in green above