WebDynpro Notification Service with multiple Application Servers

Hello Experts,
I am currently working on a project where I have to integrate a BSP Application into a new Web Dynpro ABAP Application. On the BSP Page it is possible to edit some details (for example for a customer).
When the user start to work on the BSP Page, the Web Dynpro Page should prohibit the navigation (i.e. disable all links). After Saving the BSP page, the navigation lock is released and the Web Dynpro reloads some data, which were changed from the BSP Page.
I have a NetWeaver 7.02 so I decided to use Shared Objects and the new Web Dynpro Notification Service to realize the given requirements. On the development system everything worked fine. The Notification Service was called and it took about 2 Seconds until the Web Dynpro Application updated.
But we got serious problems on the testmachine, which uses a Web Dispatcher and two application servers. After some research we managed that the application is running, and works.
But the Notification Service takes now up to 1 Minute until it fires the registered actions. And I good frequently an ASSERTION_FAILED from the method CL_WDR_NOTIFICATION=>ATTACH_FOR_READ in the ST22 as long as the application is running.
Can anybody help me how to solve this issue. It is a real blocker for the project.
If there is another way to establish eventing between Web Dynpro and BSP I would also go for another solution. But I don't think there are many other possibilities (SAP Portal and NWBC are no options - Maybe the new Web Dynpro PageBuilder?).
Best Regards
Daniel

Hello Guys,
we decided to do a workaround for the moment. We use a refresh button on the Web Dynpro screen. That is not very nice, but sufficient for the moment.
Anyway: I am still interessted in the BSP-Web Dynpro Interaction Issue. So if somebody has any ideas, please let me know.
@PageBuilder: Currently the page builder does not work on the system, because of an 403 - Error when I try to call the Application-Configurator (the SICF service is active). But I will try this also as soon as this problem is solved.
Best regards
Daniel

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