Problem with ComposedMessageProcessor sample

Hello,

I have a problem with theBizTalk 2006 sample: ComposedMessageProcessor.
This sample uses a pipeline receive inside an orchestration.
This sample is useful with a small quantity of message to debatch (One to
many messages).
But there are a memory when I try with several thousands messages to debatch
(one to 10000 messages).

Biztalk process increases without limit when the orchestration exits from
scope inside the orchestration (scope using receive pipeline). Then,
OutOfMemory problem. The quanity of messages should not be too important for
my hardware, but BizTalk increases until 1.2 Go before generate an
OutOfMemory exception.

I detect that the problem appears when I need to construct message with data
from pipeline.

Very strange.