No automatic update after yum update to cents 6.4

[MartijnV]

Hi,

I recently updates via yum update to cents 6.4 to get fail2ban to work.

However since 13 march the automatic update is not functioning (imo). On the main panel it says:
The system is up-to-date; last checked at Mar 13, 2013 03:30 AM

My question: So is my system up to date? Or is plesk not checking for update anymore?

Thanks in advance.

Regards, Martijn