BizTalk: Error - An error has occurred while establishing a connection to the server

This error usually occurs if you are using a third party BizTalk Demo or BizTalk Application.

You need to change the Server name in the BizTalk application configuration:

“WIN2K-2005-PC” is a third party server name which you have to change it to  your local PC name or just change it to word LOCAL as you see in the following snapshot.

NOTE: Must change it for both Configuration Settings (Development/Deployment)