I was getting an error in our BizTalk 2009 development box:
The Messaging Engine failed to register an adapter "WCF-WSHttp". Details: "Registering multiple adapter types within the same process is not a supported configuration. For e.g. HTTP and SOAP receive adapters cannot co-exist in the same process"
What seemed to be the issue was that different BizTalk Transport Types (one being WCF-WSHttp and the other being WCF-BasicHttp) were being associated to the same IIS App Pool. Creating a new App Pool for a particular Transport Type (or properly re-assigning the web-site's App Pool designation) should do the trick.
Make sure when you set up your BizTalk web apps (web sites in IIS) that you separate your App Pools based on your BizTalk Transport Types properly.
