Persistence of ejb timers

[balteo]

Hello,

I am trying for my ejb timers to survive a server restart. I have this:

<enterprise-beans>
 <session>
 <ejb-name>TimerSessionBean</ejb-name>
 <jndi-name>TimerSessionBean</jndi-name>
 <timer-persistence>true</timer-persistence>
 </session>
 </enterprise-beans>

However if I restart the server the timers are no longer executed.

Can anyone help please?

Thanks in advance,

Julien Martin.