Change Music (Pokemon Insurgence 1.2.3)

Hello, so I’ve been playing Pokemon Insurgence for a while and I must say I’m getting a bit bored of the songs in game. Thus, I decided to download some instrumental music on youtube and converted it into the .ogg files that were required in the BGM file in Audio. However, even after changing the name and everything, it doesn’t work… Does anyone have any idea how to do this?