Hmm.. what is this "COMPOSITE DEVICE" supposed to be used for? Could it be some type of MODEM driver? Had you gone to BlackBerry - BlackBerry Support | Knowledge Base, Product Documentation Software & Support Programs
and make certain to download the DTM 4.2 SP2 file? If so, what specific file name did you download? The same website, I believe, has some modem drivers available and also, I believe, the BlackBerry Device Manager program in case you need that too.
I'll see what I can find on the BB Tech Knowledge Base dealing with "composite devices" and see what comes up. Does that have some video / camera support? Can you play some mpegs or other video formats on it? It could involve those too. Don't know what I can find but I'll do some searching and see what I find.