Sims 3 Custom Music won't work at all

I wanted to have my own music in Sims 3, so I downloaded a handful of songs and input them into the custom music folder. I however, also deleted all the existing songs that Sims had in there. Idk if that was a bad idea or not, or if it's the cause of this. Anyways, when I try to play custom music in the game, it'll still play all the old songs that I had deleted and will not play the ones I added. They won't even show up in the songs list in the options menu. When I first input them, I dragged all the music into the file. My second attempt was to take them al out then just copy paste them in. That didn't work either. They're all mp3 files too, so it's not that either. I don't know what else to do besides ask the internet. I tried searching for answers, but everyone had gotten it to work before then it stopped working, not never ever working like me. Help me solve this issue so I can hear my Bring Me The Horizon music please.