Thanks for your answer ...
I explain you the problem :
1) I've downloaded DotNetNuke 4.3.4 StarterKit
2) I opened Visual Web Developer and I create a new Web Site with the template DotNetNuke.
3) I started the project (Ctrl F5), it created all the modules.
4) Everything was all right. I've changed the setup of the web site and I created some new pages inside of Visual Web Developer.
5) I decided to do a test environment to do some checks ...
6) I copy the directory which was created by Visual Web Developer to a new directory.
7) I started Visual Web Developer and I opened my new directory
8) I did a Ctrl F5 to start the new project and I got a
The page cannot be displayed
9) I've checked all the web.config and I did some tests ... I did not find something.
It looks like the DataBase.mdf had a record with the name of the directory in it ...
Thanks a lot for your help ...
Jean-Pierre Cornez - Luxembourg