Transaction Queue does not stop at exception

I'm using SmartClient Power edition. I've got a transaction that submits several DSRequests in a queue.

The second request throws an exception. BUT, it does not stop processing. It continues to the other requests in the queue.

The log file extract below is about a server logs. How can I get the exception to stop processing the rest of the queue.

Attached Files

	rollback_issue1.txt (21.3 KB)
	rollback_issue2.txt (32.0 KB)
	rollback_issue3.txt (24.6 KB)