How To Integrate ADO In A Windows Service

The problem is integrating an ADO connection into a Service in C#. The peculiar thing is that the same thing works well in an application but throws a problem in the Service i.e. the Service doesnt want to start...

The problem is at establishing the connection - but the same thing works just fine in an Windows application.

string MySqlConnString = "SERVER=N16\SQLEXPRESS; TRusted_connection=yes; database = EventTrack2007";

MySqlConnection = new SqlConnection();

MySqlConnection.ConnectionString = MySqlConnString;

MySqlConnection.Open();

Thank you!