Hi Maria,
First, please review this blog posted by Salvatore Castro. If the response from the table query you are executing in MII is in a Rowsets/Rowset/Row Document format, simply apply the xsd referenced in the blog to each MII Output transaction and select the Rowsets Element Name, like this:
You should also insert a sample of each the query results in the related Output Transaction as well. Once you have accomplished this and saved the transaction, from Visual Studio simply Update your Service Reference.
You may have to build an XSD specific to your query responses if they are not in the Document format above. But once you have done this correctly, your WSDL and the response from the MII transaction should have the correct type mapping for the response.
Regards, Steve