[ubuntu] VSFTP user Browsing problem

view story

http://ubuntuforums.org – I have created a ftp user and added the user to the chroot list. When i log into the user account using filezilla the user is directed to a specific folder, ie /var/www/site1folder. The problem is that the user can back out into, www, then var, then system folders are all vizible. How can i stop the user being able to browse other folder. Any assistance (the easier the better) WOULD BE APPRECIATED THANKS. (Hardware)