Android : How can I interface an Android App with SQL Server

first of all sorry if I will do some mistakes, but my first language is not english.

This is my problem:

I have to make an Android App that recover some data from an existing database situated on MS SQL Server on Windows Server 2003. I don't know so much server-side programming languages so I'm searching on the Internet and I've found that I have to use a Web Service between my app and the Classic ASP page that connect to database. I also found that I have to use SOAP to send data to the server with my app, using ksoap2 library in Android, and I found how to configure it on the client side. But I can't find how to configure the WebService and which format is better for interface my app and the classic ASP page.

Maybe it's a stupid question, I don't know but unfortunately I don't understood enough server-side programming. Thank you so much to everyone who will help me and obviously every replies are accepted.