SqlConnection and TransactionScope Timeout

I have a TransactionScope (over DTC,开发者_JAVA百科 read committed) with a timeout of 60 minutes. In the TransactionScope I have opened the connection (I hope to enlist in the transaction) but after 30 seconds I get a timeout.

In the machine.config I changed the system.transaction maxTimeout to 60 minutes.

Why does the timeout occur after 30 seconds?

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A SqlCommand already has a CommandTimeout property that defaults to 30 seconds. May be you are using it within your transaction.