HTTP System for URL iView

Hello,

I try to use a HTTP System to define the Server URL for several URL-iViews.

I found some hints in this message:

[Trouble with a URL iView|Trouble with a URL iView]

Here are the steps:
1. Create HTTP Portal System. To define an HTTP system, choose Content Management -> Global Services -> System Landscape Definitions -> Systems -> HTTP System.
2. On the URL iView, only provide the relative path to your application.
3. Under the System field, select the HTTP System that you created.
4. On your EPA, include the HTTP System.
5. All the client need to do is change the address in the HTTP System and all the URL iViews will be changed accordingly.

and

I gave in the Server URL while setting it up as http://<computername>:<port> and the relative path in the URL as /<nameOfApplication>.

But, when I try to create a http System i?m not able to specify any "Server URL" property at all...

How can i use a URL iViews without hardcoding the servername in every URL iView ?

Thanks

Johannes