Okay. FrontPage and all other WYSIWYG HTML editors put in a lot of extra tags and things which at times creates unforseen problems like this.
Yesterday, I opened your page in IE and it showed me that white margin at right. Some days back it only showed it in Netscape Today again I opened it in IE and it looks fine!! In NS it is still showing it.
I am no expert at HTML but I think I will have to take a closer look at the tags before the body tag starts. In the mean time, try removing whatever is useless in that part and see. I don't have Frontpage so I can't try margins and things. But will surely look at it in the new year. I will be back in my town on 3rd.
Merry Christmas to you and your family.