Excel: Files Won't Open from Windows Explorer

I can't open any Excel document directly by double-clicking in the explorer. It appears a message like:

"Couldn't find the file "filename.xls" (or any of its components). Check the path and filename and that all the required libraries are reachable".

Do you have any idea of what could be happening?

I don't have any problem when I first start Excel, and open the files from the menu FILE --> OPEN.

It seems to me it's a problem with the DDE server or something like that, maybe a library missing... umm.. Any idea?

Thanks in advance.

Best regards.
SPOOLLY

 

Try:

Tools-Option, General tab.

Remove checkmark from "ignore other applications"