django - add iframe element containing source url of my web page inside another site

I want to add iframe with source url of my own a web page - inside another site page.

but my page is not being displayed inside the iframe, I'm getting error in the browser console:
Refused to display 'http://my.site.com/page/' in a frame because it set 'X-Frame-Options' to 'SAMEORIGIN'.

I've tried to set django x-frame-options, and this is my view:
from django.views.decorators.clickjacking import xframe_options_exempt

@xframe_options_exempt
def ok_to_load_in_a_frame(request):
    return render_to_response('test.html', {},  context_instance=RequestContext(request))

but it doesn't work for some reason... any idea?

thanks.