How to prevent opening a blank excel file

Hi,
I am using Lotus Notes as my email application. Whenever I open an excel attachment, a blank excel file ,named "Book1" ,will also be created and shown on the monitor together with the attachment. Hence I have two opened excel file. Kindly advice me how to prevent this from happening. I am using Microsoft Office 2003.

Thanks
Regards

I have Lotus Notes myself but when I open an Excel attachment it doesnt open a blank workbook.

Try to check your Lotus Notes preferences, options, etc. Not sure if this is an Excel or Lotus option to prevent this.