Cubase on Mac OS 10.8.2 => Problem?

Since the update to Mac OS 10.8.2, i have a problem with Cubase… It functions well at the beginning, then after a few minutes (or hours), if i close Cubase, I cannot any more open it! I must start again my Mac or close my session. Is it possible that this problem come from Mac OS 10.8.2?

After a few minutes a message indicates to me that there would be a problem with eLicence Control, the last version should be installed. Ok, but the last version cannot be installed on my computer! The following message appears : “Le message spécifié est introuvable à l’index 16”… What can i do?