DealDohNUTzy - Just tested it and it works perfectly fine for me, As i say re build sound cache and re verify game files and it should be fine, Also make sure of any concert mods on as they have credits in most of them, you would need to edit the concert mod and delete the credits in it re build it and drop it outside of the addons folder and un sub that concert mod, This is my fix suggestions for you.

DealDohNutzy - Worked fine last i checked, But i will check again, And one mod cant affect the others as its simply and audio file for 2 credits, 56 people have no issue and reported nothing no working, I would suggest you re sync your audio also with this command in the console " snd_rebuildaudiocache " and re verify your game files also, And also check for any mods that are conflicting in red, If you have any concert mods that will conflict with this making it not work as most concert mods have credits in them.