[Zope] 2 isp's, only 1 allows connection to http://localhost:8080

i am using internet explorer 5, trying to connect to this page, 1 isp allows connection every time, the other doesn't at all. i was hoping to change to the one that doesn't permanently & get rid of the other. is there any way to get around this. i think its something to do with cgi scripts being accepted by the isp. it is mentioned in the zap document very briefly. does anyone know an answer? thanks michael