SSO Problem with WebDispatcher and Java-Stack

Hello SAP Experts,

WAS: NW2004S

SRM: SRM Server 550

We are using SAP WebDispatcher in DMZ as reverse Proxy to access the SAP SRM System. Login to the SRM ITS Services works perfect but starting J2EE applications like LAC (Live Auction Cockpit) or Document Server causes in an additional login Pop-up window. After login again the J2EE Applets working fine.

Starting the SRM application without WebDispatcher, the J2EE Applets are accessible without login again.

Looks that the SSO settings between ABAP and Java are correct.

Is there any SSO settings to do in Web Dispatcher (e.g. importing SSO Certificate)?

Thanks for you answers.

Kind regards

Axel