Cant prelisten expansion on SD card anymore

Hello Forum,

I am totally new to the MPC world, got my X SE few days before and already bought an expansion which I saved on a SD card.
Yesterday I could prelisten in the browser area to the kits but today it isnt working. Audition is on Auto, thats not the problem. I can prelisten to the wav files but not to the kits.

Hopefully anyone can help me out?
Thank you very much!

...it seems that I found the problem by myself. The SD card is obviously damaged. I saved the pack on the USB stick and it works fine again.