Your memory is low, try this link for information: http://www.blackberryforums.com/gene...-logs-sms.html

However, I don't think the calendar normally deletes. However, I could be wrong. But have you checked calendar/options/Keep appointments? There you can change how long they are kept.

Also you can pull the battery to help clear up memory. With the phone on, remove the battery for at least 30 seconds, then replace.

Wanda