Custom Soundscape Problem

[The_Gl!tch.exe]

I'm new to the creation of custom soundscapes and I need some help with it.

The sound for it is in ...\Team Fortress\tf\sound\glitchexe\space_junk_galaxy_super_mario_galaxy.wav

I've also created a .txt-file in ...\Team Fortress\tf\scripts\mario_galaxy.txt

Here's its content:
"Mario.Galaxy"
{
"playlooping"
{
"volume" ".15"
"pitch" "100"
"wave" "sound\glitchexe\space_junk_galaxy_super_mario_galaxy.wav"
}
}

The soundscape is controlled by a trigger_soundscape and is connected with it with the name mario_galaxy. (The env_soundcape entity doesn't touch anything)

Is there a detail I've missed? (the music doesn't play)