Microsoft Excel Opening Problem

Hi

I'm using MS Office 2000 with XP professional SP2.

Lately when opening Excel (fresh or existing xls file), it just kept
opening, non-stop, from sheet 1 and going on until I press Esc key.

However, after pressing the Esc key to stop the automatic opening of the
unwanted sheets, the program functions normally.

When closing Excel, I have to close all the unwanted opened-sheets first
before the program can exit.

Any help to retify this problem is much appreciated.

Alan