Okay I have found the answer with a search in UT from Troy Reganall:
Re: Active VFP Simple Example From Documentation Thread #1041907 Message #1041935

>Hi all,
>
>I have downloaded ActiveVFP and built a new project. This has worked fine. Afterwards I changed the "hello" script with another string in the main of the new project. I have rebuilt the project, but when I recall the website I still see "Hello World" instead of the new string.
>
>What am I doing wrong?
>
>Thanks beforehand.