SOAP UI Pro does not recognise WSDL with optional fields

Hi,

I have a request xml for my service where you have an option to choose one fields out of two fields (see the screen shot).

I opened a request in FORM view in SOAP UI Pro. A drop down appears in the in the request XML in FORM view.
When I select an option from that Drop Down and new field appear in the request XML and I enter the data in that field.
When I change my view to XML view in SOAP UI Pro, I don't see that field anymore.

Please see the attached screen shot and request XML.