Error publishing Air in Flash CS3

Hi All

On the Adobe Air Flash CS3 wiki page
(http://labs.adobe.com/wiki/index.php/AIR:Flash_CS3_Professional_Update :Getting_Started_with_AIR_for_Flash_CS3_Professional)

I found a simlpe tutorial "Creating an Adobe AIR application in Flash"
I thought well this can't be hard can it?

However when I use the Publish Air File button in the 'AIR - Applications and Installer Settings' window I will get the following error:

"namespace is invalid in the application descriptor file"

Now I have tried to look into the XML file but I cannot see any problems.
I also tried to use the descriptor-template.xml which came with the Air - SDK

However also that will not work.

Has anyone got an idea why I get this error?