CallNet 0800 is urging users to be on their guard after someone masquerading as an official from CallNet Security was found asking for user names and passwords. "On no account offer this information to ANYBODY!!," explained Keith Goodyer, chief technical officer at World CallNet. The email message was a fake and the net was closing in on the perpetrator of this particular scam, he said. Elsewhere, subscribers of AOL UK have created an Online Members Group to address problems some users have with the service provider. According to an OMG spokeswoman, people cannot log on, they experience engaged numbers, and speeds have suffered. "We were not getting the answers we wanted from the AOL tech people," she said. "All we are constantly being fobbed off with is that they are working on it." ® Related stories: Security hole found at CallNet 0800 CallNet boasts big numbers in spite of problems So how good is CallNet 0800? 'No catch' 0800 access opens for UK business