MCS Control Manager detected MCS is not responding to HTTP requests. The http status code and text is %1, %2.%12 Possible ...

%11MCS Control Manager detected MCS is not responding to HTTP requests.  The http status code and text is %1, %2.%12

Possible cause: Internet Information Services (IIS) isn't configured to listen on the ports over which the site is configured to communicate. 
Solution: Verify that the designated Web Site is configured to use the same ports which the site is configured to use.

Possible cause: The designated Web Site is disabled in IIS. 
Solution: Verify that the designated Web Site is enabled, and functioning properly.

Possible cause: The MP ISAPI Application Identity does not have the requisite logon privileges. 
Solution: Verify that the account that the MP ISAPI is configured to run under has not been denied batch logon rights through group policy.

For more information, refer to Microsoft Knowledge Base.
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