Java Access Bridge. Getting acces to a standalone JRE.

I want to get access through the Java Access Bridge to an application that has its own JRE. JAB works fine for me with the "public" JRE (SE 7). But the target application has its own JRE (SE 6). However neither Monkey nor Ferret (Oracles testapplications) display any information about the application, although it does it with SwingSet3 in a test. But I know that it is possible due to third party applications that make use of JAB to get access to it. Has anybody an idea how to manage this?

Using Win7 x64
Visual Studio 2010
Win 32 application
Java SE 7_u7
target apps JRE is JSE 6.