UBB.threads PHP Forum Software Community Forums UBB.threads 7 Version 7 Support Fixed width left colum

As you can see, the left column is too width. The content on that side is only 120px. WHere can I set the column width to 120px? I tried the leftcolum.tpl, but then I have a lot of white space between the left column and the middle one.
Look at http://www.femistyle.be/ubbthreads/ubbthreads.php?ubb=cfrm