[Zope] <dtml-whois> tag don't work

Hi, i tried ti install whoistools on my zope 2.3.0 but i found an error in the source of whois.py at the sock.connect line which was sock.connect(server, port) i correct it with sock.connect((server, port)) and it started ti run in python. But wher i try to use it from the <dtml-whois> tag i gat everytime : Unexpected tag, for tag <dtml-whois "'internic.net'">, on line 1 of ppp I see that the Zope don't list the prodects in the control panel under Products. Any ideaa?? thanks, Bye, Marcello