Ispconfig doesn't shows quota website
I'm using a fresh install of ispconfig under Debian 6. Actually, Ispconfig doesn't shows quotas for my websites.
I follow the usual guide for installing ispconfig on Debian, but I'm thinking one thing. I don't have only one partition on my server. I have a separated partition for /var, but according to the (helpful) guide, I set quota on /.
Can it be the source of my problem?
If there is, how can I deactivate quota on / and activate quota on /var?
Some help will be much appreciated :-)
Thanks by advance.