If you are using the HTTP send adapter on BizTalk 2006 to send requests to an apache or other no-windows based http server and getting the error “cannot access a disposed object. System.net.sockets.networkstream” probably you should read this KB you will need to 1-apply the hotfix mentioned 2-create a custom send pipeline with a custom pipeline component to set the keepalive property to false, I have created a a very simple one you can download it from here.
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