Outlook Major problem

I use outlook XP for most of my scheduling and email. I went to enter a new calander entry yesterday and could not. Upon further investigation I can’t create anything new in any of the features of Outlook. No new mail, no new messages etc. It is as of it is in read only mode. I have done nothing to make it this way, however my 2 year old daughter will just start hitting keys on the keyboard if someone leaves my office door open. It is like a magnet for her. She may have done something. However, 2 hours of searching on the Internet has left me no closer to an answer. PLEASE HELP. I really need to use this program.

Michael Hansen