I am guessing that within your game folder you have a folder called "Sounds". In which case, you would use:
Function Load_Sounds()
load sound 1,"Sounds/about_me.wav"
load sound 2,"Sounds/basic_func.wav"
load sound 3,"Sounds/calculator.wav"
load sound 4,"Sounds/credits.wav"
load sound 5,"Sounds/environment.wav"
load sound 6,"Sounds/goodbye.wav"
load sound 7,"Sounds/guess_game.wav"
load sound 8,"Sounds/history.wav"
load sound 9,"Sounds/learn_about_you.wav"
load sound 10,"Sounds/question_menu.wav"
load sound 11,"Sounds/welcome.wav"
load sound 12,"Sounds/welcome_back.wav"
load sound 13,"Sounds/what_to_do.wav"
load sound 14,"Sounds/what_to_play.wav"
endfunction
Also I think you need to use "load music" for .wma files.
If you want to use the sounds commands then you'll need to use .mp3 or .wav formats