Does anyone know how to make Outlook Express the default E-Mail program ??

I have tried selecting Tools\Options and checking the option 'Make Outlook Express my default E-Mail program' from within Outlook Express, but once the program is closed this option becomes unchecked again.

I have also gone into Internet Explorer properties and selected the programs tab but Outlook Express is not an option from the 'Mail' combobox, (although it is for the 'News' combobox.

When selecting the Mail\Read mail option from within Internet Explorer I would like to have Outlook Express start up (although currently it doesn't, but does if I select Mail\Read News).

Any comments would be appreciated.