NIS 2010 - Scheduled scans not running..

Hi I've noticed that my daily scheduled scans haven't run for about a week. I started a manual scan today but had to cancel it (to do something else) and now I'm unable to run a manual scan.

I've also tried to re-schedule the scan but have been asked for a password?

 

I'm running NIS 2010, Win7 and Firefox.

 

Many Thanks

 

Ian