XML : Get All Sales Order from Quick Book via QuickBook WebConnector using asp.net

I am using QuicBook Premier Edition UK , I have a company file open inside QuickBook. Build a sample WebService provided in samples and host in IIS. Added that application in WebConnector by using qwc file in samples. I understood the callback methods required by WebConnector in soap service.

• authenticate

• clientVersion

• closeConnection

• connectionError

• getLastError

• receiveResponseXML

• sendRequestXML

I have tested web service by using WebConnector by using Update Selected button and it gives response 'OK' . But I am still confused how to get started with soap service , samples include 3 Xml request CustomerQuery, InvoiceQuery and BillQuery . How I test these request and see the response by using service . Can anyone explain the steps required to get me started with my own request of Get all Sales Order. Thanks

Here is the screenshot

Here is the Last Output. Version: 2.0.0.1

Message: OK

Description: Via closeConnection(): CloseConnection called to application. Response received from application = OK