How do I edit Flash templates I downloaded?

I have a version of Macromedia Flash MX version 6.0. I also downloaded some free [COLOR=“Black”]Flash Templates[/COLOR] to use with this to edit for my site, but whenever I try to open FLA files, error occurred. Whenever I try to open the SWF files, it just shows a blank image and all the menu buttons in Flash MX disappear - it just shows the SWF by itself.

Macromedia Flash MX is old, beyond OLD.