KMQuake engine problems (AMD/ATI)

[Mr. Boog (Xenianmatter)]

So I purchased and played Quake 2 after modifying it to run on KMQuake with music, worked fine. Then I purchase and modify quake 2 mission packs, ran them on kmquake and they lag especially when AIs are present and when shooting guns like the blaster. Does anyone understand why this happens? (If this has anything to do with it i have Catalyst version 12.4)

[CG Nitro]

What spec is your PC? (KMQuake DOES NOT WORK on mobility ATI so if you're using a laptop that's the problem)

What settings are you using in the game?

Did you close everything in the background?