Entities not working properly

Well, I made a map in hammer with a couple entities. One was a env_fire and the other was a trigger_hurt. Anyways, my fire is huge, even though when I tested it, it was small. The trigger_hurt just starts working without me pressing the button. Both of these worked fine in CSS, but when I play it in Garry’s Mod, its screwed up. Can I fix this, or is this just a glitch that can’t? Thanks.