BizTalk orchestration log event 10034

in this BizTalk orchestration, my .net class will access ADO .Net and get data from database. However, when I sent a message to the orchestration, the following error occurred. I am wondering if the orchestration cannot access the database? Please advise, thanks.

xlang/s engine event log entry: Uncaught exception (see the 'inner exception' below) has suspended an instance of service 'BizTalk_Server_test.BizTalk_Orchestration_1(13b5f384-5a0b-0ad8-3ef9-489d80200b58)'.

The service instance will remain suspended until administratively resumed or terminated. If resumed the instance will continue from its last persisted state and may re-throw the same unexpected exception.

InstanceId: 5299e71a-0092-4bef-a770-8153181b2b8a Shape name: 开发者_如何学GoExpression_1 ShapeId: bc04ec19-bc1e-40a7-aaed-75a9b0628891 Exception thrown from: segment 1, progress 6 Inner exception: The specified named connection is either not found in the configuration, not intended to be used with the EntityClient provider, or not valid. Exception type: ArgumentException Source: System.Data.Entity Target Site: Void ChangeConnectionString(System.String)

The following is a stack trace that identifies the location where the exception occured at System.Data.EntityClient.EntityConnection.ChangeConnectionString(String newConnectionString) at System.Data.EntityClient.EntityConnection..ctor(String connectionString) at System.Data.Objects.ObjectContext.CreateEntityConnection(String connectionString) at g2.interop.Abbyy.Reader.XmlReader.CaseNumReader() at BizTalk_Server_test.BizTalk_Orchestration_1.segment1(StopConditions stopOn) at Microsoft.XLANGs.Core.SegmentScheduler.RunASegment(Segment s, StopConditions stopCond, Exception& exp)

If you're not passing the connection string in the context when it's being created and it's looking for it in a config file, you will need to put the connection string in the btsntsvc.exe.config file.