Sample Artifacts Appearing

Hi all,
I am having some issues with JJOS 128XL.
I successfully load samples into the MPC. They play fine.
When I save them, power off the MPC, and the recall the project, some of them come back with artifacts, small beeps and pops. It has mostly happened to samples that exceed 4 seconds in length, but has appeared on some one-shot drum samples as well.

Has anyone had any experience with this issue before? If so, do you know what the cause is?

My theories right now:
-Bad CF card
-error from filename being too long
-error from peak levels being too high
-CF card reader/writer errors
-jjos 128xl filewrite/read error

I just got a new CF card last night and am waiting to see if this will reoccur.

Thanks to all for your help.

did you format the CF card with the MPC function in the save/load window? Does sound like you are getting corrupted files though. So format card, try again, then different card maybe to see. There is not any peak problem either as nothing goes over 0db and just gets cut of in that file format I believe. And File name length kinda just gets shortened, and usually wont do this unless the whole first 16 characters are all the same, then you might get a few issues.