Perhaps the problem is in the SD card. I use only B&O recomended SD card. This is SanDisk.
Alen
BS 1, BeoCom 2, 2x LC 2, Form 2, BS 2, BS 3, 2x Beo 4, BS 5, BM 5, BL 5,Beo 6, BS 6, 2x A8, BV 8-40, BL 8000, 3x A9 Keyring, Serenata, BeoTime, BeoTalk 400