Calling web services in BODS with nested schemas?

Hi community

I'm trying to call a web service in bods, as it is shown in the following example:

http://www.sdn.sap.com/irj/boc/go/portal/prtroot/docs/library/uuid/20bd5e60-11f9-2b10-2bbb-b5109cceff08?QuickLink=index&overridelayout=true&39698382721890

Now im facing the challenge to map the input schema with the variable post code to the request schema, definied in the wsdl-documentof the webservice. In the example the web service has only one level. My webservice has 2 nested levels while i can not nest the input parameters that way. this leads to the situation, that i get an error that says that the number of columns between in and output are not corresponding. but it is not possible to map the aRequest node from the input schema directly to the aRequest schema of the output:

Has anyone experience in that function who can help me?

Knd regards

Matthias