my map doesn't work ?!

[Amnesiaplayer]

i haven't backed up my materials.CFG and never changed something :S
i only add something because the AMFP floor sounds wasn't... normal.. the STONE ground gives the sound of a mansion ?! so i got hel.. i had to add something and change the name "Concrete"into my custom name.. i did it but it didn't work... so for safety i erased it again... now i can open my map but if i walk on STONE like the Doorway-frame of Mansion it crashed... if i crouch and go through nothing happens... it's the Sound... it's materials.Cfg