LESSON: "Could not publish to the server" error when develop Web Services by IBM AST

This morning, I created a new java project and subsequently some POJO classes in the AST 6.1, then I made use of the built-in web service wizard to create services, unfortunately, I always encountered the error at the last step: "Could not publish to the
server... Check Network Deployment settings in the server editor".

After some hacking, finally I figured it out. I learned that before we use web service wizard, we should create a new profile and server respectively in advance, otherwise, AST would create a server using the dmgr profile automatically, rather than an application
server profile, of course, that would not work!