"Not allowed" isn't quite correct.
Frames are "not supported".
The reason your page is blank is because you left out the noframes part of the code.
If you go to this page you will see your frames displayed. No images? Yes, that is because the page isn't on your site, and you used relative rather than absolute URLs for the images.
But as you can see, even if you add the noframes section, you still have issues that need to be taken care of. A bigger bottom frame to allow for the advertising for one.