HELP with Spyro 3 and Theme park world

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I have just rented Spyro 3 and theme park world. I have clone cd with a plextor cd writer, i have had no problems b4, but now, i copy these, and when i start the game, Spyro loads up, then when i go to the next level, it doesn't work and with theme park world, it only lets me do the practice level!!!

whats goin on?