Out of memory or system resources opening or creating an appointment

[Steve Furphy]

Hi,
I'm running Outlook 2002 SP2 (10.4219.4219).
If I try to open an existing appointment or create a new
appointment I receive the message "Out of memory or system
resources. Close some windows or programs and try again".
This occurs even if Outlook is only application running.

If I double click on the calendar only clock cursor
appears briefly.

It appears to be related to Appointment Form. Since I can
click once in the calendar and type directly into a new
appointment (in the calendar view).
I also noticed that if I use: Tools->Forms->Choose a Form
selecting from standard forms and choosing Appointment
gives same message. (Interestingly it happens also for
Meeting Request form).

I've uninstalled / reinstalled; Deleted FRMCACHE.Dat;
Deleted all files in outlook data directory (...Local
Settings\Application Data\Microsoft\Outlook\*.*); started
outlook with /resetfolders /cleanfinders /cleanfreebusy
parameters.

All no joy...
Has anyone has this trouble and know how to fix it?
I'm getting desperate....!