[Zope] Q: howto change HTTP_REFERER

I want to change the value of HTTP_REFERER for a response. The Zope Quick Reference states that there is a method "set" to change a value of a variable for the RESPONSE object. But <dtml-call "RESPONSE.set('HTTP_REFERER', HTTP_REFERER)"> gives an AttributeError. BTW: I am doing this in order to redirect a response to the second last HTTP_REFERER as I have moved most of my methods to a folder beneath the top folder. Maybe there is a better way to do this? Any ideas? Andreas ********************************************************************** This email message has been swept by MIMEsweeper for the presence of computer viruses. Francotyp-Postalia AG & Co.