Bluj -
another option to that step is to goto your settings folder, then look for "sounds.cnfg" and open that using notepad. (right click, open with....select notepad)
This should open up a list of files with volumes. Maker sure all are set at .80 except for master/overall volume = 1.0, then External Engine (1.0) and Engine (.85)
save and close.
or you can use the intereface on the AH clipboard.
also, if you're not hearing anything, make sure you dont have a "sounds" folder inside the "sounds" folder.