HTTP Referer has to be changed.

Hi, I've got a problem with the HTTP_REFERER. I'll explain it to you now. I've got a site where I can't logon to to change some things. That site checks the HTTP_REFERER variable and if it matches with what's in the MySQL db it passes you through. Now I've got a site which has to have access to that site. Is there a possiblity to change the referer in the httpheader? I already tried header("Http-referer: www.name.com"); and header("Referer: www.name.com"); and so one, but the headers_sent() function keeps on returing false. (So headers aren't sent) When I replace the referer for e.g. Location: www.name.com the header is sent (headers_sent() returns true) Hope someone can help me. Greetz & already thanks. Frank