loadMovie() doesn't work when in HTML

I have a flash file (main.fla) that contains an empty movie clip which has the action :


When I test the movie in Flash it works fine.
It also works fine when I have Flash closed & just open the (main.swf) file.
And, of course, the loaded movie (myMovie.swf) plays fine too.

HOWEVER, when I embed the main movie file (main.swf) into an HTML page, it will NOT load “myMovie.swf” like it’s supposed to.

Note: when I embed “myMovie.swf” into the HTML page, it works fine.

Anyone know why it’s doing this?

[Both files are in the same folder]
[I have tried embedding it into a fresh HTML multiple times]