I am trying to add a button image behind the category words in the Top navigation bar.

In the stylesheet.css, I have changed the #navCatTabs ul li a code to this:

Code:
#navCatTabs ul li a  { color: #ffffff; font-family: Verdana, Arial, Helvetica, sans-serif; text-decoration: none; white-space: nowrap; margin: 0; padding: 0 0.5em; background-image: url("../images/Nav-Buttons.gif");background-repeat: no-repeat; }
Right now the image is not stretching/spanning the length of the category name. Take a look at www.learn2scrap.com/Shop . I am also losing the right side rounded corner.

How can I make this work?