404 Error when adding products to site

Hi,

I have been trying to add a new product to my site. I get the following message when I click add product:

Quote:

The webpage cannot be found HTTP 404
Most likely causes:
There might be a typing error in the address.
If you clicked on a link, it may be out of date.

What you can try:
Retype the address.

Go back to the previous page.

Go to and look for the information you want.

More information

This error (HTTP 404 Not Found) means that Internet Explorer was able to connect to the website, but the page you wanted was not found. It's possible that the webpage is temporarily unavailable. Alternatively, the website might have changed or removed the webpage.

For more information about HTTP errors, see Help.

I have no problem adding categories to the pages only products. the new product page is pointing to http://www.ieguana.com/(admin page)/categories.php the add category button works file and I can make sub categories, yet I have this issue.

The steps I have taken to try to fix are as follows:

remove existing admin directory, reinstall and configure from scratch
removed all existing sample products, added categories for my products
try to add product and receive error.

Is this a rights issue or something? I am using dreamweaver CS3 for the development of the site on Go Daddy's servers (linux).

I have checked permissions and they are fine for read/write access.

I have search the site and found 1 reference to this in the past but there was no solution listed. I am new to PHP, so I am learning on the fly as I go.