Biztalk 2006 - Tutorial 2, Lesson 5, step 1

I am trying to build the Orchestration project and get the error

Error	1	'POConfirmed_Instance': if shared data is updated in a parallel
then all references in every task must be in a synchronized or atomic
 scope	C:\Tutorial\Lessons\B2BSolution\B2
BOrchestrations\B2BProcess.odx	302	2
6

Can someone help please?

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