there's a lot of variables here you are not providing. to start with, is it a burn or a legit game? how did it not work exactly, red screen? you need to swich discs without the playstation realizing it ejected, the slidecard would do this but only for a fat ps2. you need to either get the little metal bits to place inside or do the questionable "tape and tissue" mod. Personally, on a slim, I would suggest just using ESR anyway.