custom sounds

i made a new jet engine sound and want to put it in my planes folder but for some reason two things happen
one it always gives me a default sound a prop it sounds like and two sometimes i get no sound
can anybody help me with these problems
i need to know how to label the sounds or the plane to except the changes
thanks
wayne
one it always gives me a default sound a prop it sounds like and two sometimes i get no sound
can anybody help me with these problems
i need to know how to label the sounds or the plane to except the changes
thanks
wayne