AS2 sound control

im trying to get a simple thing to work with sound but so far no luck.
i have a flash project with a number scene and im trying to have different sounds in each. also im trying to have sound control in certain parts of the project. i want sound to start of

lalbg = new Sound(this);
lalbg.attachSound(“lalbg”);
lalbg.start();
lalbg.setVolume(10);

at volume 10 and play till the end of the scene, and increase by 10 on each roll over of a button i tried everything and cant get it to work

thx pavel