My bestseller box for sidebox doesn't show anymore!

Hi All;

My bestseller sidebox was perfectly fine. I tried to add the bestseller thumbnail module (from the download website) and it didn't work out that well. Therefore, I decided to take out all the files related to that module. After that, I tried to install the Testimonial Manager and then the problem arised. After I installed the manager, my bestseller sidebox just shows the products without a box surrounding it. My box is totally gone and I tried to look at all the files and tried reloading the bestseller files and it was no help. Here is a link for reference:

http://www.kandnniche.com/catalog/index.php?main_page=index

The bestseller box is suppose to appear above the special sidebox but now the box is gone. Please help!

sorted out, thanks!