DF Player mp3 structure

hello
I want to make my DFPlayer to have 2 triggers:

ADKey 1 (plays segment 1)
ADkey 2 (plays segment 5)


I have tried every combination of folder structure but I only get playback from AD Key 1

My folder structure is:

Structure1:
\MP3\01\0001.mp3
\MP3\05\0001.mp3

Structure2:
\MP3\01\0001.mp3
\MP3\05\0005.mp3

Structure3:
\MP3\0001.mp3
\MP3\0005.mp3


I really dont know what else to try. How do I rename an mp3 to play segment 5 with ADKEY 2 ?

when I press ADKEY 2 nothing happens.


thanks