Help with Front rotor Removal

Need help on removing front rotor from a 99 discovery series 2. I took the caliper off (2 12mm bolts) then I removed the caliper bracket, on the actual rotor there is a holding screw that holds the rotor, I took that off, I even took off the large nut in the center of the hub, the rotor does not want to come off, I tried with a hammer to loosen it? Am I missing anything here? Ive done brakes on other cars surely its the same with the disco, any advice would be appreciated. thank you