Regis Philbin's attempt to stop the National Enquirer from running a story about him in next week's issue apparently has failed. According to Enquirer flack Robert Valvo, who refused to divulge the nature of the supposed scandal, the Who Wants to Be a Millionaire host did try to block the story from running, to no avail. "It's the front page," Valvo tells TV Guide Online. "And we're not giving [any details] out until it hits newsstands tomorrow morning." An unnamed ABC source was quoted in the New York Post as saying Philbin "blew his top when he heard about the Enquirer story." Counters Philbin's rep: "We don't comment on tabloid issues."