Wake from sleep log-in issue

Can anyone advise how to have Automator log-in with my password? I want to run an iCal script with a daily event I have created to back up some files automatically. The script runs fine, but only after wake and my manual log-in because I have not enabled auto log-in. I have used Energy Saver prefs and created an iCal event, but don’t want to set my Mac to auto log-in on wake for security reasons.