Excel XP will not open xls file

[Tony]

When I double-click any xls file, Excel starts but the
file will not open. I can use 'file/open' the open it, I
just can't double click it. Any ideas?
Thanks

 

[Lady Layla]

In Excel Tools Options General and uncheck Ignore other applications


: When I double-click any xls file, Excel starts but the
: file will not open. I can use 'file/open' the open it, I
: just can't double click it. Any ideas?
: Thanks