Office 2003 - Outlook calendar - new & existing appointment proble

[Guest]

Although working fine up until yesterday, today I am unable to open existing
appointments in my calendar, nor am I able to create new appointments.
I regularly sync with a blackberry and am hesitant to sync with is while
calendar isn't working properly.
Does anyone know what I should do to fix outlook?

 

[Vince Averello [MVP-Outlook]]

What happens when you try to open or create appointments now? Also, did
anything happen yesterday (crash, software install, etc)?

 

[Guest]

One of my users just called me about this same issue. He can even create a
new appt for another user (when clicking on the calendar). I had him try to
create a new appt by clicking on the NEW appt icon - but nothing happens. I
had him attempt to create a new appt by using FILE/NEW APPT and nothing
happens. No pop up window.

He was fine yesterday - has rebooted his laptop and restarted Outlook a few
times to no avail. Plus, nothing out of the ordinary happened from what I
can tell - no crashes, no additional software adds/deletes, etc.

I'm stumped.