Fail to attach database : MSDTC Check status of transaction
This will mark all the MSDTC transactions as failed and allow you to start the database. It's a better idea to use backup/restore to refresh the database though

sp_configure 'show advanced options', 1 
GO 
RECONFIGURE 
GO 
sp_configure 'in-doubt xact resolution', 2 -– presume abort 
GO 
RECONFIGURE