I've a problem during the compile of downloaded flex projects

(with Flex Development)

I copy the project folder in Flex Builder 3 folder

Now.... File -> Import -> Flex Project
I Import the project in Flex Dev

I execute the debug ... or I execute the project

"Run Main" -> can't find bin-debug/main.html
"Debug Main" -> can't find bin-debug/main.html

I've tried with
Project -> "Export Release Build" -> Can't find /Dashboard/libs folder
... I've tried to create the Libs folder
and I see:

Encountered errors or warnings while building project main.mxml.
main.mxml: Cannot create HTML wrapper. Right-click here to recreate folder
html-template.

How Can I compile (and view) the project

Copy the "html-template" directory from one of your other projectsand try again.

Greeeeeeeat!!!

Thanks!!