I think I conveyed you wrongly.I am working on one finance project. my client asked me to need to connect our project with QuickBooks.now locally my local host application connects with my quick book desktop application and can send data from my app to quick book. my problem is I moved my application to another server.so now I cannot send data to QuickBooks.so I learned lot according to move to web connector.download the web connector.it expected QWC file but really I don't know what is a qwc file. then I saw one sample file in my SDK package then I used that but always authentication failed.I can't understand why we create web service and how I connect my application to QB via web service. how I give the properties I n QWc file.what is owner id.i got a lot of confusions.please anyone helps me:smileysad: