Problem with props being nocollide on a DR serevr HELP

I have been looking a round the internet and on here and i cant seem to fine the answer all i got is that u need the HF:Ep2 witch i have but i don’t know what to do from here PLZ HELP S:

Make sure that when you installed the server that you forced install dir. If you didn’t you’ll have folders like Counter-Strike Source/cstrike, etc. Hyphens are bad, and folders should be lowercase for compatibility.