The Server.Transfer and Server.Execute methods occur on the server side, so they can't affect what the browser does.  Here's what these methods really do:

 

Make sure requested fwx file is compiled.  If not compile it.

Use VFP's DO command to call compiled FXP file.

Return to calling script (in the case of Server.Execute), or end call (in the case of Server.Transfer).

 

In order to open a new window you must either use the window.open method in JavaScript code that you send to the browser, or use the TARGET clause of <a> or <form> tags.