Failed to create drum patch

Hi, I recently purchased an op-1 and I can’t find any solutions to not being able to add my own drum patches.

I can download drum patches and add them just fine, but when I make my own (under 12 seconds, under 1 mb, mono output) it fails to create them.
What am I doing wrong? does there need to be silence between hits?
Thanks in advance, sorry if this has been covered, I’ve been searching all morning and can’t seem to find a solution.

figured it out!! have to bounce files as aif instead of convert them to aif

This is a must for any kit creator : )

https://splice.com/plugins/26589-op-1-drum-utility-vst-au-by-xfer-records