This article was previously published under Q243664
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BUG #: 56633 (SQLBUG_70)
SQL Server provides distributed transaction capabilities through the Distributed Transaction Coordinator (DTC). When you establish a DTC transaction (ITransactionDispenser::BeginTransaction), the isolation level is specified.
The first SQL Server connection to enlist in the specified DTC transaction obtains and maintains the isolation level. However, subsequent connections, which enlist in the transaction, retain their current isolation level and do not obtain the DTC isolation level.
Immediately after enlisting in the DTC transaction, perform an explicit set operation to establish a matching isolation level for the connection and DTC transaction scope.
Microsoft has confirmed this to be a problem in SQL Server 7.0. This problem has been corrected in U.S. Service Pack 2 for Microsoft SQL Server 7.0. For more information, click the following article number to view the article in the Microsoft Knowledge Base:
254561 INF: How to Obtain Service Pack 2 for Microsoft SQL Server 7.0 and Microsoft Data Engine (MSDE) 1.0
For more information, contact your primary support provider.