Hi, could you give us more information?
First of all, version of the backup module (apt-cache policy ebox-ebackup).
What's your exact configuration? I mean, full frecquency, incremental frecquency... I suppose you have an incremental backup everyday at 10PM, but what about the full one?
Is the module enabled on Module Status?
Could you also show us the output of this?
cat /etc/cron.d/ebox-ebackup
Thanks!