Key change at end of staff

Hi all,
I'm running Kubuntu 8.10, MuseScore 0.9.5 rev 1565
Here is my problem:
there is a key change in my score, and this change occurs exactly at the change of system. So, I have for example my G Major in system 1, and D Major in system 2; usually, there is a cautionary key change at the end of the system 1. It works fine already for the measure change (3/4, 4/4, etc), but not for the key changes, and I don't know if it works for the clef changes, I've not tested.

Didn't I searched enough, or is some feature missing?
Thanks for your help, and congratulations for this great software.

Pierrot