Outlook 2003 Error message

[Gerald A. Connell]

When I right click on the desktop and go to settings, and change the
resolution of the monitor, an error message pops up. It has "Microsoft
Office Outlook" at the top, and the text, following an X, reads:
"Could not complete the operation. One or more parameter values are
not valid."

In fact, the resolution will change, so that's not a problem. The same
error message will pop up when I change the Desktop setting, even
thought the change will occur.

If I shut down Outlook, the error message does not appear when I
change the settings.

Any help?

Thanks,

Gerry