Ah, I can tell this is going to be trouble. I checked your source and it's a bit too much for me to investigate, but I think you'll need to change the width of the entire table, from taking a quick glance at it. I think it's this line:
...
<table height="736" cellspacing="0" cellpadding="0" width="780" align="center" bgcolor="#ffffff" border="0" gridy="6" gridx="6">
...
Try making it smaller. Unfortunately, you've got so many TR and TDs after this which also specify widths.. you may have to change those, as well.
Sorry for the lack of support.. I haven't seen a table layout in years.. switch to CSS
