WebDynpro -> iview -> different backend systems ?!?

Hi all, confusion again ...

I have the following situation.

I developed a simple Web Dynpro application calling a bapi and deployed it to my Portal (host netweaver). During design time/rfc-model creation i used 2 JCO Connections: wd_modeldata_dest and wd_rfc_metadata_dest, both pointing to a development R/3 4.6c backend system (host CKE).

Everything works fine, i can test the Application in the Web Dynpro Content-Administrator.

Then i create a Web-Dynpro iview including this Application and give it the System 'CKT', that is our Test-R/3. No problem during creation.

When i test that iview it still goes to the 'CKE' and not to the 'CKT' to call the bapi and i found no way to change that. ( Nevertheless the iview asks for a CKT-User/Pwd before running !)

It can't be possible, that an application is bound to one backend system during design time, so it must be my mistake. Lateron we also have to use this iview for the R/3 production system.

How can i solve this ? Thank you