Play custom resource pack sound doesn't work

I tried to make my minecraft map with resource pack but I couldn't play the custom sound

What I expected to happen was...:
that it would play my custom sound that I placed in my resource pack

What actually happened was...:
it did nothing

Steps to Reproduce:
1. Download my(or other) resource pack: http://www.mediafire.com/download/y06czutiac9ilkb/SCP+Containtment+breach+Resource+Pack.zip
2. /playsound CustomSCPclose @p

Btw I tried sethblings resource pack and the only thing that worked was CustomSound, but one and two don't work either