Alerts not respond does not sent Mail (Ver 9.2 Pl 3)

Hi ,

Could not find out why our Elerts are not working :

1. The AlertSvc Is super user

2. The user is define onto the Elerts in the SBO

2. The staus of the job cofigurtion is "Runing".

3. If I am manualy stop it and reopen it again - only then it sent the alerts through emails .

I sew that more people had the same issue - may anyone have a solution for that?

Did someone know any procedure whom may close and open again this service ?