Invalid File name

:confused;

I am trying a 30-day trial version of Dreamweaver CS3, and when I try to make
a Flash Text or Flash Button item, (eg. a "Home" link) I get an error message
stating that the "home.swf" is an invalid file name. It doesn't matter what I
name it, even if I leave it as the default "text1.swf", I get this error
message. Is this a trial download issue or am I doing something wrong? I can do
the task on my Mac at work with no trouble. I'm guessing it's a trial download
program glitch issue.

Any thoughts?