Like I said before, just disable voice communication.
Or, if you're running in any video mode other than openGL, that may be the reason why your ESF just shuts down.
What video card do you have?
Well, if your video card supports OpenGL, set your HL to that. Have a suitable resolution for your video card, and you shouldn't have any problems. If I were you, i'd simply download Mr. Satan's script pack. It seems to fix everyone's problems.
