Usually when your target is an html file the placeholder has more than a path. If you open panorama html with Notepad, or whatever you use as an editor, do you see <head> bunch of code </head> and <body> bunch of code </body>?

If you do, you copy the relevant sections into the place holder (head section to placeholder head, body to body).
The panorama files and folders need to be in the same folder as the html file that has the placeholder.

The blue sections are the files from the hypothetical panorama (actually a form).

Click image for larger version.  Name: !Form.jpg  Views: 72  Size: 18.1 KB  ID: 124448