Problem saving settings

When I try to change a setting like create a new trigger, or adding
new actions, or adding a new folder to scan in the catalog, it works.
But the next time Quicksilver starts, it forgot everything and uses my
old settings. So I have to start all over again. How can I fix that?

I use the last Build 3815 under Mac OS 10.5.4
Thank you for your help.