In the future, please don't yell at him or rub his nose in the pee/poop/vomit/whatever if he has an accident. Those "remedies" do not work and are just old wives tales. What they actually do is make your cat afraid of you.

To get the pee odor out of the bed, try one of the more specialized products made specifically for removing pet odors. There are certain things in cat urine that can not be removed by conventional products such as Lysol. Even if the smell seems to be gone, your cat may still be able to smell it. I believe there is a product called NillOdor that is made specifically for pet stains/odors.

Best of luck, and please don't give up!