CHRIS Brown has denied claims Jay-Z threatened to end his career.The singer was reportedly warned by the rapper last month that he would never work in music if he hurts Rihanna again.However, Brown has insisted that the conversation was "respectful” and that no threats were aimed at him by Jay-Z."It was cordial. It was real respectful,” Brown told US radio show Power 106. "It was nothing like that. Me and him, it was like a green room [situation] and it was cool.”"People like to take it and run with it because they have nothing else.”He added: "The funny thing is that with all these rumours and stuff, is that with other artistes you’ll hear 30 different rumours in a week and maybe one sticks.The Sun