Error Handling in 2006

Thanks for the new feature, it becomes easy to deal with the suspended queue. But still i got a question.

In a receive port A, I checked the option \”Generate error report for failed message\”

And then create another send port B to subscribe to A, but only send errors:
Filter:
ErrorReport.ReceivePortName==A And
ErrorReport.FailureCode Exists

When i delete a start tag in the file, the error handling function is fine, send the file to a folder instead of suspended queue.

But if i omitted a mandatory (minOccur=1, maxOccur=1) element, the file went through to destination folder without errors even though the validation should fail.

What should i do to catch missing mandatory field error?

Thanks for any advice.