JDBC XML SQL: Attribute "action" missing or wrong XML structure

Hi pros,

I have a problem using the JDBC receiver adapter with SQL XML. I have the following message which should be processed by the receiver JDBC adapter:

I think this fits exactly the structure described here: Document Format for the Receiver JDBC Adapter - SAP NetWeaver Exchange Infrastructure - SAP Library

But when I test it, I get the following error:

MP: exception caught with cause com.sap.engine.interfaces.messaging.api.exception.MessagingException: Error processing request in sax parser: No 'action' attribute found in XML document (attribute "action" missing or wrong XML structure)

What is wrong with my message?

Thanks in advance!