[Warlord]

Sometimes when I play at Crazybob's CnR my fps drops and it causes lag. I usually turn fraps on (I am not recording, I use it to see my fps) It is always around 50-60 fps then suddenly it will become 10-20 fps (And it goes back to normal after few seconds.)... It doesn't happen in other servers. Is there any way I can fix this?

I will appreciate every input. +Rep for everyone that will add good answer.