Idle full system scan not running

On 2-19-2009 I uninstalled and reinstalled NIS 2009 (which is 7 days ago) and my idle full system scan has not ran yet. My idle quick system scan ran 14 times since the reinstall. Is there a problem and is anybody else having this issue, or should i just wait a couple more days and see if it runs? Today I let my computer sit idle for 50 minutes, and It didn't run an idle full system scan. In my settings, idle time scan is set for weekly.