kdilorenzo,
Error 3 is caused by a bug in the BB OS. It means that you have an event in your calendar with a start date prior to 1970 (probably someones birthday). The BB OS returns this error when a 3rd party app tries to read the appointments.
It's been reported to RIM, but I don't have any fix for it nor an eta.
Options...change the appointment's start date (put the actual birthday in the notes field)
To configure the backlight, go to Settings / Utility Settings
There's complete documentation on the web site....
http://www.crossriversystems.com/pocketday
Also, support questions can be sent by replying to the email that had your key in it.
Mark