level sounds

I'm making a map called "mvm_berserker". I want to replace the announcer with Merasmus, yet I can't seem to get level sounds to work. I set the file name to "mvm_berserker_a4_level_sounds.txt", and the path in my "maps" folder. Yet it just doesn't work. The map too is "mvm_berserker_a4.bsp" Is...