Please post messages in plain text.

I am not familiar with your particular editor, but it sounds like you have not set up paths for it to access various browsers. Look in the editor's settings/options for preview browsers, and there should be a place to set it up.

Even with proper setup though, you're probably still not going to get what you expect. HTML can be rendered by any browser, locally, without the need for a server. PHP needs to be processed on a server, so it won't work without one.