ERROR: MSDTC on server 'servername' is unavailable

ERROR: MSDTC on server 'servername' is unavailable.


MSDTC on server 'servername' is unavailable

By default, when a stand-alone instance of Microsoft SQL Server exists in a cluster environment, the SQL Server-based instance is set to start automatically. If the host node is rebooted, you may receive the following error message when you issue commands that are related to distributed transactions:

ERROR: MSDTC on server 'servername' is unavailable.

POSSIBLE SOLUTION : 

On the server where the trigger resides, you need to turn the MSDTC service on.
You can this by clicking

START > SETTINGS > CONTROL PANEL > ADMINISTRATIVE TOOLS > SERVICES. 
Find the service called 'Distributed Transaction Coordinator' and RIGHT CLICK (on it and select) > Start.