The artist formerly known as CAT STEVENS could still face difficulties entering the United States - two years after being refused entry into the country because of national security fears. In 2004, after flying to the United States from London, the Muslim convert, now known as Yusuf Islam, was barred from entering after US security officials said his name was on list of banned individuals. Now plans to tour America promoting his comeback album AN OTHER CUP could be in jeopardy for the same reason. ANN DAVIS, a spokeswoman for the Transportation Security Agency, told the New York Daily News, "The TSA does not confirm whether any name is on or not on the 'no-fly' list. But Mr Islam was a positive match on numerous watch lists when Customs and Borders Protection agents interviewed him in Maine. "They refused him admission to the United States based on national security grounds." However, SHEILA RICHMAN, spokeswoman for Islam's US record label Atlantic, remains optimistic: "We don't yet have firm touring plans for Yusuf. We hope he will be coming here in mid-November."