A few words to the installation in your invironment:

1. The Notes database should be created in a sub-directory called FLEX in the Domino data directory. You  can create the database in any other location, but then you need to adjust the respective URLs in the Flex project action script files.
2. You need to sign the database with the server ID.
3. THIS SAMPLE HAS NOT BEEN DESIGNED FOR SCENARIOS WHERE AUTHENTICATION IS REQUIRED.
4. If you require authentication, you need to place the Flash application for instance in the flexdemo.nsf database in a form (e.g. About Document) and launch the Flash application using the respective URL. This way authentication takes place before launching the Flash file.
5. If you require to launch the Flash application from a different location (local or different domain server), then this sample is no good. You need implement an authentication procedure in your Flex application as outlined here...Read more.
6. In the Flex project change the HTTPService URL to your domain...
   <mx:HTTPService
   id="httpservice"
   useProxy="false"
   method="GET"
   contentType="application/xml"
   url="http://<your domain root URL>/flex/flexdemo.nsf/BooksXML?OpenView"/>
7. Recompile the project

I hope this clarifies a few things and brings you on the right track.

Thanks for the reply.

But still it doesn't work for me.

1. The application is on the data\flex directory. (data\Flex\Flexdemo.nsf)

2. I signed the database with the active server id.

3. The default access is designer so anyone can access this database.

What i am interesting in is the url to launch the demo.
I tried <hostname>/Flex/Flexdemo.nsf (it shows the authentication succesfull page), also tried to open the swf file itself on page (<hostname>/Flex/Flexdemo.nsf/flexdemo1/$FILE/XmlViewDemo.swf) and this gives me an empty view with title Book Catalogue.

Must i make an adjustment somewhere?
I looked at the Webservice.script and the FlexDomino (WSP) but i didn't find anything to adjust. (url or something..)

Thanks.

Not sure about this, but I believe for web access you should add an Anonymous entry.

 Anonymous =  Unspecified, Reader (minimum)

Try to enter the view's URL directly into the browser (use IE not FireFox) ...

http://<your domain>/flex/flexdemo.nsf/BooksXML

You should see something like this...

Please note point 6) in my first reply (I just added the point so you have not missed it previously)

Oke, now it's getting clear to me.

I did not had an ".swf" file where the http service resides. Thinking to easy of things sometimes...

I downloaded the source from your website adjusted point 6, like you said, compiled the project and .

How simple, and looks great.

Thanks!!

Glad you got it working.

I must admit that I'm a bit lazy regarding documentation and installation instructions. I will try in the coming weeks to document all the posted samples. 

No problem at all.
I'm also lazy to find out how it works.
There are lots of examples on how Flex, in regarding to Lotus Domino, works.

To make an decision to fully emprace Flex i'll have to find out how the calendar and a bit of workflow works in flex in combination with Lotus Domino.

Thanks Matthias.

Calendaring in Notes is generally very difficult, whether you try to develop something in Notes or from an external system. The reason is that the Notes calendaring is very complex and there is no specific API that one could use.

In matter of fact I learned at LS 2010 that IBM is planning on developing a REST API for calendaring. But this will not be available anytime soon.

We have experimented with the IBM ILOG calendar component, but had to (temporarily) drop the project to be able to focus on our SoapGateQ! and FlexGateQ! projects.