Home button directed to 404 Error File Not Found

[nigelt74]

Hi all,
I have v1.3.9h.

When you visit my site for the first time and click on the "home" button (which is linked to my index.php) on the navbar, it will direct you to a "404 Error File Not Found" page. But if you click on something else, such as product page, faq page or something else and THEN click on the "Home" button, it will work as it should (link to my home page, index.php). Any ideas?

Thanks in advance

A link would help as generally we aren't all psychic, and my psychic abilities have been effected by the misalignment of the astrological symbols.