http://support.microsoft.com/kb/926092
For each file screen, FSRM sends only one notification within each notification interval. By default, the notification interval is 60 minutes. You can change this interval by using the Filescrn.exe utility together with configuration files.
Note If you set the notification interval to a period that is too short, FSRM may generate excessive events and e-mail messages. Therefore, you may experience performance reduction.
You can set the RunLimitInterval parameter in text-based configuration files to change the notification interval from the default of 60 minutes. This parameter value is the number of minutes that FSRM will wait until it sends another notification for the same file screen. When this value is set to 0 (zero), FSRM sends notifications every time that a user operation triggers a file screen.