"Comodo Antivirus reports that it is turned off"

Hello,

All of a sudden, after the last Comodo update, I get:

“Comodo Antivirus reports that it is turned off” ???

in my Vista Home Premium security center, and the red warning shield.
Comodo, however, says:

“All systems are active and running”.

What is going on?
My Comodo version is 3.13.125662.579

Please help
Thanks!