Loading new WSDL file Validation doesn't recognize "extension"

I am sort of new with SOAP, please excuse me if I like dumb asking this question.

Basically I load a URL http://......?WSDL

On the SOAPUI app, automatically prepopulates all the fields found in the WSDL, but I ran into an issue where it doesn't recognize the when a complexType is extended

<s:complexContent mixed="false">
          <s:extension base="s1:someFields">
.....

 So this is suppose to extend a complexType someFields, and it includes some more fields, but the SOAPUI didn't populate these in the soap envelope XML that is prepopulated on new requests

Any thoughts ideas, or is this a bug