If you get the following error when attempting to activate your night vision goggles (pressing "N") in the AHK program:

"Error: Failed" --- "051: SoundPlay(SoundsFolder . "nvgOn.mp3""

Then you can try the following fix:

• Close out of the AHK program.
• Go into the SOUNDS folder.
• Double-click one of the .mp3 files, let's use "nvgOff.mp3" for this example.
• Windows should ask you "What program do you want to use to run this file?"
  

• Select something like, Windows Media Player, VLC, something that can actually play .mp3 files.
• Listen to see if you hear the sound effect when running the .mp3 in this player, if you do, great! If not, try another player.
• Finally, close out of the media player.
• Re-Open the AHK program.
• Press "N" to play the "nvgOn.mp3" sound effect.
• You should now hear the sounds. Test out the other sound effects as well and make sure they are working.