Why can't I play Mp3 from complet directory with subdirecries?

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Why can’t I play Mp3 from complet directory with subdirecries?

I need step into cd1, then play, then bact into any, step into cd2, then play…

Any\cd1

Any\cd2

István Kovács

I have:
WD TV HD Media Player, serial number WNT185213847, model/order number WDAVP00BE.
Firmware : WDTV_1_03_01