Quick change to Beverly's SQL script:
CREATE SERVICE "mysample"
TYPE 'SOAP'
DATATYPE ON
USER DBA
AUTHORIZATION OFF
AS select customers.ID from Customers ;
CREATE SERVICE "mytest1"
TYPE 'DISH'
authorization off
user dba
FORMAT null;
This just creates the SOAP service before creating the DISH that exposes it.
Now you should be able to access http://localhost:8080/mytest1 from a web browser, and from the PB web service proxy project. Make sure to use the .Net engine, not Easysoap.