Some of the Excel templates provided contain "Macros" (built-in instructions which are 
executed when the file is open). 
Your version of EXCEL may be set with a default security setting preventing the running 
of user built-in macros; this because macros from unknown origin may contain viruses.
You will have to enable the macro feature in your system (or disable the security feature 
which prevents the running of macros).
For the case of the EFFUSION.XLS template, a version without macros (OLDEFFUSION.XLS) is 
available.