CSS fix to address error with drop down navigation

Small business website, under construction, developed via Microsoft Expression 2 and using Expression Web template 'Small Business 3'. Navigation menu altered to allow for drop down selection. Drop down developed from tutorial found at this link: [login to view URL] Resulting website can be found at: [login to view URL] Problem: Drop down div #navigation grey background has extended down to full width of drop down menu. (hover over 'Service') Required: 1) Fix to CSS code so navigation and gray background does not drop down to width of drop down menu. When menu is hovered over any drop down appears over the text below (standard drop down menu operation). Fix to be uploaded to site. 2) Explaination of fix. FTP username and password to site will be delivered to coder. ![][1]