Dear Sir,
at first, please try an update via the MULTIPLEX Launcher including the voice files,
if this does not solve the problem, try the second solution:
Maybe your SD-Card is fragmentet.
then you can try the following:
Switch PROFI TX off.
Take the Micro SD-Card out.
Use a card-reader,
copy the whole content to the pc.
Format now the SD-Card as FAT 32 - 32kb clusters
then copy the whole content back to the sd-card
reinsert the card and try if the Problem was solved.
Best regards