Disable Effect Sounds?

[Perplex]

Hey there Cj Community.

Currently i am creating a new map and got a annoying problem.

I created Snowflakes with the Effect manager from Cod4 (ok they are already include but i changed some options)

But when i Start the Effect on my Map i can hear the rain drops and i just want to know how i can turn them off. SnowEffect + Rain Sounds makes a annoying combination^^

hope some1 can help

best regards