Sorted the problem finally: Deleted ALL dial ups first; Went through the Registry thoroughly, deleting all mentions of any dial ups and eventually found "sixa" ; only one instance of it. deleted it, reinstalled proper dial up; "alles in ordnung" !! eveything working OK.
Thanks to everybody who thought about my prob.
Before you criticize someone, you should walk a mile in their shoes. That way, when you criticize them, you're a mile away and you have their shoes. :