If you encounter a deadlock problem this resources can help to understand and solve the problem.
Deadlocking
http://msdn.microsoft.com/en-us/library/ms177433.aspx
Minimizing Deadlocks
http://msdn.microsoft.com/en-us/library/ms191242.aspx
Detecting and Ending Deadlocks
http://msdn.microsoft.com/en-us/library/ms178104.aspx
