New Box Files uploaded - old deleted - now no boxes at all!!

I really could need som help with this:
When starting my zencart-webshop up several years ago, the seller of the danish edition, installed my own designed box-files.
I wanted to change these box-files to another design and made 3 new files (top, midth and buttom) in accurate same size, calling them the same as the old ones and uploaded these via FTP.
Now all the boxes has disappeared from my site!!! What did I do wrong??
Newly also changed the banner and uploaded this without any problem.
Please help!

We can't see the site, and I don't know what a box-file is.

The site is: https://www.tjekijas-juvel.dk
My box-files is stored in: includes/templates/classic/images ... same folder as the banner (logo.gif).
They are called: box000.gif / box001.gif / box002.gif

Ok ... found out, that I wrongly have named the files with a capital first.
But now all the boxes is "floating together" into one long box!!
Why can this be?

This rule in your stylesheet is causing it:

stylesheet.css (line 549)

.leftBoxContainer, .rightBoxContainer {
background-image: url("../images/box001.gif");
background-repeat: repeat-y;
margin-top: 0;
}
Change that to whatever box spacing you want, and add a new rule after it like

#categories {margin-top: 0;}