physics collision problem g mod

My ground doesnt block any props. Props go trought of this in g mod but in css it blocks props. And i used nodraw under it. Can anybody help me?

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R?l? se kohta paisteataan...

Would help greatly if the compile log was posted to check for errors / hints to what the problem is.

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Hell, is an half-filled auditorium

Is the ground a displacement?

Is the ground a displacement?

yes...

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R?l? se kohta paisteataan...

Is the ground a displacement?

yes...

Then this is a more common problem I believe. I remember a method or compile parameter that supposedly fixed the problem. Some searching should give you an answer.

I need answer