You can fix this problem by doing a Software Update.

• Go to your Chat Monitor settings, either by clicking on the icon (Visible Mode), or using your Hot Key combination (Stealth Mode).
• Click on the "File" menu and go to "Update Software"
• Go through the Update Wizard
  
  Reboot your computer after the update to make sure the changes take effect. Also, make sure the correct time/time zone are set on your computer and in Chat Monitor Settings.